high quality plastic book screw Material: PE,PVC Colour: Natural Costomized designs ... Stationery button SN-00G (see specification sheet) of plastic primarily used in the Showcase button stationery, books, photo ... , easy installation, light weight.2. The use of plastic materials: UL qualified NYLON66, fire rating 94V-2.3 ... the ROHS, standing stock, common industry. high quality plastic book screw SN-15G