... 3.rubber,pvc,pu 4.OEM High Quality Volleyball For Match or Training1)Description: ·Nylon wound·Official size & weight·Highly ... pvc,pu cover with rubber or butyl bladder.·Rubber,pvc,pu volleyball are perfect for the playground or sports field. With water ... because we are manufactory, we are the source.·We have Beach Volleyballs, Training Volleyballls and Match Volleyballs. SOCCER BALLS, FOOTBALLS, ...