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Perfly BST990, Badminton String

Sale price: $5.00 Regular price: $9.99

This badminton string is powerful and having comfortable impacting feel, as well as being the most powerful in our range. (0.66 mm string gauge)

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Size: Select a size
Sale price: $5.00 Regular price: $9.99

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8490727

Product Features

A photo of the Perfly BST990, Badminton String in use

Perfly BST990, Badminton String | Advanced badminton player who looks for very thin string gauge providing powerful strokes with crispy sound !

This badminton string is powerful and having comfortable impacting feel, as well as being the most powerful in our range. (0.66 mm string gauge)


Polymer multifilament core For optimum repulsion, power string gauge 0.66 MM

User comfort

Polymer Microfilaments core gauge 0.66 MM maximizes comfortable impact feel.


Polymer multifilament core with 0.66 MM gauge provides Ultimate Precision

Product Customer Reviews

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218 Reviews
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Perfly BST990, Badminton String,black
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Less color for choose

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Gap between strings

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Hello Sudipta,

We regret that this product did not meet your expectation. We would like to know what went wrong a little more elaborately and if you have some pictures, kindly send them to us so that we can give you a probable solution.

Thank you.


Good nice to play

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Really good guts

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Value for money

Have bought top quality guts from different but this stands out amongst all of them

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Beats other popular brands

I bought this string for one of my two racquets roughly 3 years back. Strung it to 26 tension. To date, the string is intact and the power seems to have diminished only a bit. The strings, surprisingly, are Made in the US.

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Super Powerful

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Best strings in the market

I have used Li Ning top shelf strings with 35 lbs on my top of the line yonex power racket with aerodynamic frame. It's nothing compared to this string from decathlon, I like the texture, quality, and shot sound from this string. This string has a matte sort of finish, unlike the glossy finish of Li Ning, even though people prefer the sound of Li Ning and Yonex strings, I feel this black 990 from decathlon produces realistic sound. Other brands make loud sound on each hit which makes the game distracting.

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String is extremely good

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Excellent Product

No issues till now with regular use. Better than the original string came with the racket.

String got cut while stiching

There were no stocks in the store got it online delivered from Other store and they broke it while netting. Very pathetic service

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string was broken within a day

Within a day the string was broken.Two days back I restringed the racquet now it’s broken

Hello Sandeep,

We are really sorry that you faced such an issue. We would like ask you on which racket did you put the strings and from where did you get the stringing done, like from Decathlon or outside Decathlon.

Please reply to this so that we can serve you better.

Thank you.



Very good string

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Dear Runaldu, thank you for your time for rating on our product. We are glad that we managed to delight you with the product you choose. We really appreciate your loyalty with Decathlon. If there is anything else we can improve on in the future, please do not hesitate to contact me at Thank you once again for your time and we hope to serve you again soon!

good quality product

very good string.feel like bg66

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Badminton Racquet Restring

Good quality. The sales reps are helpful and courteous.

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Hello Chia, thank you for your time in leaving us with a 5-Star rating on our product & service. We are glad that we managed to restring your racket for the best performance for you on the court. Please let us know if there is anything else we can improve on in the future. Thank you once again for your time and we hope to serve you again soon!


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Additional Product Information


Racket string

  • 50% Polyamide
  • 50% Resin

Proprietary polymer core proprietary polymer microfilaments

To prevent from tension loss and maximizes strength and durability For optimum repulsion, power and shot making Ultimate Precision



Product testing

Toxicology, solidity and durability tests are carried out for over 50 hours in our TechCenter labs, as well as on courts to test the strings in real-world playing conditions.

Storage instructions

Keep the string in dry place under normal natural weather condition.

Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

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    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual