Accessories for belts/chains Tighteners Tighterners made from steel, zincplated steel, stainless steel or plastic. Tensioners Pinion tighteners. Pulley for V-belt. Rollers. Steel, galvanized steel, plastic. Pinions, Pulleys, Rollers, Blocks Pinions. Pulleys, Rollers & Sliding Blocks for V-belts, timing belts and chains. Idler Tensioner wheel with bearings - for chains. Idlers. GRIGIO Automatic chain tensioner