This is a kit of 2 x brand new VITO'S PERFORMANCE wrist pin bearings These are the ultra-premium SILVER CAGE bearings, best on the market today Fits all Yamaha Blaster 200 and Banshee 350 ATVS Size: 16mm ID x 21mm OD x 22.5mm Width(standard) These will fit all OEM crankshaft rods and pistons, as we