The SaltPlus Orion Guard Sprocket utilises modern CNC machining technology to create a sprocket and guard in one piece. Made from CNC machined 6061-T6 aluminium that's 8mm thick with two holes for sprocket bolts increasing the life of the sprocket. It boasts an incredibly strong and durable 4-spoke design with chain protection from the integrated sprocket guard. Can be run on 19mm, 22mm and 24mm cranks with the supplied adapters. ###section### Product Specs TYPE: Bolt On MATERIAL: Alloy WEIGHT: 149.7g (5.28oz)