The TLF Series toggle lock flange covers feature a patented design with four hinged plugs that can be pressed into bolt holes one at a time for faster installation than traditional covers. Features a thick pad for impact protection with reinforced walls to reduce warping and allow greater surface contact. Also permits use of a paint hook, or can be removed if the use of a bolt is needed. : : API: , NOM PIPESZ: 4, PRESSURECL: 300.