Description Thunder – Training Ball SIZES: 4, 5 PROFILE: ULTRA DURABLE TRAINING BALL, PERFECT FOR ALL TRAINING SESSIONS. TECHNICAL: Outer: PU Inner: 1 layer of 1.8 mm non-woven material. 3 layers of PV. 1 layer of Korean Vulcanized Rubber Sheet used in Lamination Process. Superior lamination process ensures good flight and strength.
