Brand: TOOPRE can provide brand authorization Name: Single Chain Guide Set Model: CG03/05/BB Material: Aluminum alloy + nylon Color: black, red, blue, orange, purple Packaging: Boxed Weight: Approximately 334g/set Box dimensions: 50*40*23cm, Quantity: 20 sets/box, Weight: 7.5kg/box. Applicable: Threaded BB bottom bracket/ISCG03/ISCG05 universal. Features: The main body is made of high-strength aluminum alloy, CNC-processed, lightweight and high-strength, sturdy and durable. The guide rail provides a limit function for the chain, preventing the chain from falling off the sprocket during riding.