Features： 1、Outer Chamfer Design: The outer chamfer design of the bicycle chain avoids the interference of the teeth with the chain shift, and the operation is smoother. 2、High Strength Shaft Center: Built in high strength shaft center, high rigidity reinforced structure, tight, flexible and not jammed, bearing high treading force. 3、Applicable To: This bicycle speed chain is applicable to all kinds of 11 speeds, 2 x 11 speed and 3 x 11 speed drive system. 4、Alloy Steel: The chain of mountain bike is made of alloy steel material, which is durable and has a long service life. 5、Lightweight Design: This 11 speed bicycle chain is light in weight and easy to install that is the best choice for replacing your old or broken bike chain. Specification： Item Type: Speed Bike Chain Material: Alloy steel Gross Weight: 300g/10.6oz Package List： 1 x Speed Bike Chain 2 x Chain Connector 1 x Storage Box