CollarSafe "Basic" 3/4 inch Wide Replacement Collar -Fits most (not all) Receiver Modules requiring HOLES for PetSafe &others, wireless containment, electric fence, yard training, bark CollarSafe's Basic 3/4" Wide Replacement Collar adjusts up to 30 inch length (easily customizable shorter, see included instructions) UV, Water & Stain Resistant - Your Choice of Several Different Hole Spacing Patterns Durable Polypropylene Webbing - approx. 1.29mm thick - 600 lbs tensile strength These are NOT traditional dog collars and do NOT have "D" rings or any metal which may interfere with RF signals Made in the USA - Eco-Friendly features minimal retail packaging