safety technology international, inc. -sti 6518 bopper stopper with spring loaded hinge the clear polycarbonate thick protective cover helps protect everything from electrical outlets to push buttons to volume and lighting controls. inexpensive and highly durable, this hinged cover lives up to its name for a wide range of applications. cost effective and easy to install. the bopper stopper can take hard knocks in stride while protecting digital keypads, electrical outlets, smaller size pull stations and push buttons to name just a few. both the cover and hinge is molded of polycarbonate material while the hinge springs are formed from stainless steel. the cover comes complete with installation screws and gasket. bopper stopper is backed by a 3 year guarantee against breakage in normal use. ul listed to u.s. and canadian safety standards. typical working properties of polycarbonate are -40 to 250f (-40 to 121c) and 94v-2 flammability rating. safety technology international, inc. "we protect the things that protect you" SKU:ADIB001ULJR4S