GOOFIT 10mm Drive Chain Pulley Roller Slider Tensioner Wheel Guide for Street Bike Motorcycle ATV Black

["Replacement for most of dirt pit bikes,street bikes,motorcycles,ATV,off road vehicles.","Size:outer diameter:38mm/1.5\",inner diameter:8mm/0.31\",iron core height:25.5mm/1\".","Enhances chain stability and prevents derailment during off-road riding.reduces chain wear by minimizing friction with the frame.made of durable materials for long-lasting performance.","Please check the model number,size,and picture before ordering to make sure this is the correct part.","Package including:tensioner x 1pc,GOOFIT keychain x 1pc."]