Porcelynne Silver Metal Alloy Replacement Bra Strap Slide and Ring Set - 5/8" (16mm) Opening - (2 Rings - 2 Slides) Silver metal alloy hardware. Used on bra straps, tank top straps and headbands. Accommodates 5/8" wide elastic. Opening is 5/8" by 1/8". Replacement hardware for straps. Matching hardware also available by Porcelynne