3/4inch replacement strap - purple petsafe fits many petsafe containment collars.our own strap with upgraded materials... 3/4" width high-quality nylon strap heavy-duty black "snap-lock" buckle unique curved design of buckle provides added comfort for the pet and convenience for the owner collar adjusts to fit neck sizes up to 26 inches. comes with 2 pre-cut holes. available in red, black, royal blue, purple, and neon pinkcomes standard on the petsafe pul-250, prf-275-19, and pul-275. also works with many other petsafe containment collars.