This is a genuine Casio G-Shock back cover gasket. Model number: 74206244 Fits the following models: DW-5600C (Module 901) DW-5600E Various DW-5600xx series DW-8600 DW-8700 G-100 GWX-5600 Unopened, brand new item in a bag, will be shipped via Yu-Packet Post Mini. If you need two or more, please inquire in the comments. If in stock, we may be able to offer a slight discount on shipping. CASIO Casio DW5600