1、Fine workmanship, precision structure, lightweight and practical. 2、Abrasion resistant heat treatment technology, sturdy and durable. 3、Strong tension, round - angle, enhance the embedded force. 4、Semi-hollow hole design for mud discharge, hard to stuck dirt, easy to clean. 5、Simple installation, symmetrical design on two-sides, both sides can be directly installed, fast and accurate. 6、3 different types for you to choose, meet your different needs. Item type: Bike Chain Condition: 100% brand new Material: steel Model: SX10EL Color: golden (hollowed-out) Section:116 Weight: Approx. 310.5g Suitable for: 10/20/30 speed mountain and road bike speed control system Model: SX11 Material: Steel Color: Silver Section:116 Weight: Approx. 300.7 g Applicable: Suitable for 11/22/33 speed mountain and road bike speed control system Model: SX12 Color: Silver Section number:126 Weight: Approx. 310.6g Applicable: Suitable for 12-speed speed control system 1 x Bike Chain 2 x Accessory Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin