CollarSafe "BIG DOG" 1.5" EXTRA WIDE Soft NYLON Replacement Collar -Fits most 2-hole modules 1-3/16" center - PetSafe&others,wireless,containment,electric fence,training,bark CollarSafe's "BIG DOG" 1.5" EXTRA WIDE Soft Nylon Replacement Collars Thicker and Softer than our Big Dog "BASIC" Model Replacement Collars 1.5 inch width and adjusts up to 30 inch length (easily customized shorter by customer, instructions included). Thickness: Approximately .071" or 1.80mm - Tensile Strength: 5,500 lbs - No Metal "D" Rings - 2 Adjustment buckles to keep collar secure - Replaces most (not all) 2-hole Collars with spacing approx 1-3/16" on center (will NOT fit R21, R22 & R51 Receiver Model Modules) Designed and Custom Made in the USA by Collar-Safe (Eco-Friendly features minimal retail packaging)