... 1.Application:Widely used in round screen 2.Material:Nature Rubber 3.Size:16mm,19mm,22mm,24mm Solid Rubber Ball for Industry ... ,32mm, φ35mm, φ40mm, φ50mm,φ83mm.2. Application:Widely used in round screen3. Material: Nature Rubber, NBR, Ethylene-Propylene Rubber, Polyurethane Rubber ... Proportion: 1~1.5For more details, please view our website! Solid Rubber Ball for Industry (not inflatable)