Porcelynne Silver Metal Alloy Replacement Bra Strap Slide and Ring Set - 3/8" (10mm) Opening - (2 Rings - 2 Slides) Silver metal alloy hardware. Used on bra straps, tank top straps and headbands. Accommodates 3/8" wide elastic. Opening is 3/8" by 1/8". Replacement hardware for straps. Matching hardware also available by Porcelynne