Bicycle chain cover 1)Material:Carbon steel SPCC 2)Finish: Plain, black, etc. 3)Center ... is professionally engaged in different kinds of material (like carbon steel,alloy steel,stainless steel,brass,etc.)screws,nuts, ... and the company. .………………………………………………………………………………………………………......... [Product Description]Bicycle chain cover1)Material:Carbon steel SPCC2)Finish: Plain, black, etc.3)Center distance: ...