Material:NB PU Specifications:16mm,19mm, 22mm,24mm,26mm,28mm,32mm,35mm,40mm,50mm other size could be customi Rubber Ball (Diameter 16/19 ... screen3. Material: Nature Rubber, NBR, Ethylene-Propylene Rubber, Polyurethane Rubber 4. Color: White, Tan, TransparentWe can manufacture as per customer's requirement NBR rubber ball