Sparky PetCo Universal 3/4" Square Buckle Hi Flex Strap Tri Tronics Compatible Refresh your pets fencing collar- keep your pets safe and yourself stress-free Compatible with Tri -Tronic Systems that use a 3/4" x 28" Strap Universal collar is  inch heavy duty high flex polyurethane coated nylon with two holes Universal 3/4" Square Buckle Hi Flex Tri Tronic Compatible Strap - Neon Yellow