Our own strap with upgraded materials…3/4 WidthHigh-Quality Nylon StrapHeavy-duty black snap-lock buckleUnique curved design of buckle provides added comfort for the pet and convenience for the ownerCollar adjusts to fit neck sizes up to 26 inches.Comes with 2 pre-cut holes.Available in Red, Black, Royal Blue, Purple, Lime, Safety Orange, and Neon PinkMADE IN THE USA (don’t be fooled by cheap knock-offs)Comes standard on the Petsafe PUL-250, PRF-275-19, and PUL-275. Also works with many other PetSafe containment collars.