Pro's Pro B-400 is a highly durable all round string constructed from a multifilament nylon co-polymer core, which is wrapped with braided filaments. It offers a combination of good elasticity, high durability and persuasive power.
Hi I'm Dave Giles, This is my Blog page, please feel free to leave a comment, I will of course review any comment before it is published. I have been involved with racket sports for over 40 yrs. I am a string tester for various companies. I play mostly tennis nowadays but have been tempted back to squash coaching.