Choose your shape. Fine-tune your feel. Three polyester strings developed with Marcos Giron.
$149.00
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On tour
Blue Steel 1.28 mm, developed with Marcos Giron.
Developed with Marcos Giron
“The Blue Steel 1.28 mm I developed with Pro Stringer is the best string on tour, and trust me, I've tried many. The feel and spin is second to none, as well as the durability. With the snap-back, it gives a consistent response on every shot, and my whole game is now built on it.”
Find your playing profile
Start with the response you want from the ball. Then choose the gauge that suits your game.
Most popular
Square · 4 edges
Maximum bite, great arc control
A square string with four edges for maximum bite on the ball. Shape high, arcing shots with great control and good spin potential. The 1.28 is the most popular string in our range.
1.23 / 1.28 mm
Round
Power with rapid snap-back
A powerful string with rapid snap-back. It bends at contact, then snaps back perfectly straight into place, giving you easy power with pinpoint depth control.
1.25 / 1.30 mm
Hexagonal · 6 edges
Six edges for maximum spin
A hexagonal string whose six edges grip the ball for heavy spin. A lively response with great revolutions on the ball.
1.20 / 1.25 mm
Fine-tune your feel
Gauge is the string’s thickness in millimetres. A smaller number means a thinner string.
More spin and bite.
1.20 / 1.23 mmMore durability and control.
1.25 / 1.28 mmFeel the difference
Each string brings a different response to the ball. Choose the feel you want to build your game around.
Make it your own
Choose your favourite reel, three individual sets, or try the range with a Mixed String Set.
Start with the string’s shape, then fine-tune its thickness. Blue Steel 1.28 is the most popular string in the range. For extra spin and bite, explore a thinner gauge.
Reviews from owners on pro-stringer.com.
I thought I was set on Alu power until I tried silver bullet. SB has great spin, plenty of power and is the most comfortable poly I’ve tried. Excited to try blue steel as a full bed and also the hybrid they suggest. Great customer service.
Saxon Watson
Verified owner
The stringing machines and the blue steel string are both of insane quality, would highly recommend to anyone
Matthew
Verified owner
I have tried several stringing machines. Finally I tried the Pro Stringer String Machine and I am extremely satisfied. It is great and easy to travel with. I use it in combination with the Blue Steel 1,23 string and a Yonex Ezone 98. I have found an exceptional combo that suits me. I can only recommend the stringing machine and the Blue Steel string. Keep it up!
Petr Motzbäuchel
Verified owner
Orders are dispatched in 2–3 days and arrive in 4–5 business days worldwide after leaving our fulfilment hub. Free on orders over $400 and on every machine.
Return it within 30 days of delivery in its original packaging. Request a return (RMA) from our team and we refund you once it is back with us.
Shipping and card processing costs are deducted. See our Returns policy.
A thinner gauge offers more spin and bite; a thicker gauge offers more durability and control. Blue Steel comes in 1.23 and 1.28 mm. Silver Bullet comes in 1.25 and 1.30 mm. Black Hex comes in 1.20 and 1.25 mm. Blue Steel 1.28 is the most popular string in the range.
One machine for tennis, badminton and squash.
Pro Stringer Strings
