This is a non-adhesive protective keyboard cover (overlay) for your HK Systems HK-7215 model and SAM4s ER-5215 model cash registers. Keep your keyboard clean and protected from wet spills, dust or any small foreign objects. This product only fits these cash register models: HK-Systems HK-7215 or the SAM4s ER-5215. This product has not been tested to fit any other cash register, and will most likely not fit any other cash register.