Square-X Black
Square-X Black
  • Load image into Gallery viewer, Square-X Black
  • Load image into Gallery viewer, Square-X Black

Square-X Black

Regular price
Sale price
Regular price
Sold out
Unit price

The Square-X is easily in our Top 3 best selling co-polys for its softness and incredible feel. Most players we know who played with rpm have switched to the Square-X not only because of the price but it’s playability and durability. If you want a very soft co-poly which is easy on the arm; incredible feel and durable but less than half the cost of rpm...then switch to this gem! 

This is a square shapes string with Two Flat surfaces, mains/crosses, in contact with each other give extra durability, no notching and the string returns very quickly from any movement after hitting the ball.

It measures 1.20mm across the flat sides and therefore plays like a much thinner string increasing power and control. We have only one word to describe this string: Unique!

NOTE: The black color plays softer than the white. 

Color: Black.
Length: 40ft/12m and 660ft/200m
Gauge: 16L (1.25mm)
Construction: Carbon Co-Polyester
Advantage: Control and Durability


YTEX Square-X - Comparable Strings Table
Reference String
Dynamite Touch
FXP Tour
Weis Cannon
Scorpion, Ultra Cable (square shape)
Tour XC
Signum Pro
Plasma Xtreme


Customer Reviews

Based on 67 reviews
Cydnee Wilkinson (United States)

These strings are the best! All 15 of my students use Square-X as well. Best overall string for spin, durability and arm friendly too!

Samuel Brown
First hit was learning experience.

Not use to playing with lower tendon.

Carlos Hernandez (Mexico)

I liked the spin. I've been hitting balls with ball machine have not played a match!

Lee Irwin (United States)
Work as promised

These were put in after we received our new racket. The kiddo plays varsity tennis for the local high school and some UTR matches. The longevity of this product is fantastic. Just recently purchased more to restring his Wilson Blade 100 V8

David Riedmayer (United States)
Beaufort High Tennis Team loved Square X

Bought the square x strings for our team -Beaufort High School( currently ranked #2 in South Carolina 4-A.) They usually play with Hyper G or RPM Blast and they love the strings !!!

Matthew Foster-Estwick (United States)
Great string

Really enjoyed this string overall

Larry Angus (United States)
Great String!

Great feel with terrific bite. Love the feel of a soft poly that has such great spin production. I would recommend this string to big hitters looking for a soft poly feel.

Thaaj B. (United States)
Plays Beautifully

Recently we know of a square string in major popularity. It’s green and it’s called Hyper G. I used to use Hyper G in my Yonex Vcore 98 at 53lbs and loved how it played. I decided to give this Ytex a try because, to be frank, the green doesn’t go with the red. I’ve been using square x at the same tension for two weeks now and love it. Plays just like hyper g in its feel however I get more control which is exactly what I needed. Will definitely continue its use and play around with more hybrids to make with it.