3/4" Width x 28" Length Square Buckle Design Waterproof, Odor proof, Square Buckle, Replacement Straps For all E Collar,Garmin, Dogtra, PetSafe, SportDOG, E Collar (Formerly Einstein), And Educator Systems Sparky Pet Co ¾” High Flex Square Buckle Replacement Strap For Garmin, Dogtra, PetSafe, SportDOG, all E Collar Systems. Our heavy polyurethane coated reflective strap is rugged and waterproof, while remaining flexible enough to fit your e-collar or GPS collar. And the strap keeps its flexibility - even in cold weather.