Rock Guard

The UL Mark is widely recognized by consumers, retailers and authorities who trust UL's integrity and commitment to consumer safety. With this in mind, UL tests every product to the highest standards to insure that any item that carries the UL Mark can be used by the consumer with confidence.

cUL Mark is the UL Mark for Canada. Products with this type of mark have been evaluated to Canadian safety requirements, which may be different from US safety requirements.