Features: brand new and high quality Name: Single Disc Chain Stabilizer Model: CG03/05 Material: Aluminum + Nylon Weight: about 318g /set (including packaging) Application: Threaded bottom bracket, ISCG03/ISCG05. Specifications: Chain Guide: 20.5x20cm/8.07x7.87in Converter: 6.8x7cm/2.68x2.76in Package Includes: Set Bike Chain Guide. note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!