Item: Replacement Electric Dog Fence Receiver Collar Strap (Adjustable) Material: Heavy Duty Nylon Size: Available in Up To 12", Up To 18" and Up To 26" Neck Sizes (Adjustable Strap) Width: 12" and 18" Are 3/4" Wide, 26" is 1" Wide Fits All Dog Fence Receivers With 1-1/4" Spacing and 1-5/8" Spacing (Center To Center) Compatible With The Following Receivers: PetSafe: PetSafe Wireless Instant Fence Receiver Models IF-100 and PIF-300 PetSafe Ultralight Receiver PUL-250 PetSafe Deluxe Ultralight Receiver PUL-275 PetSafe Stubborn Dog Receiver Model PRF-275-19 PetSafe Deluxe Bark Control Collar DBC-100 Bark Control Collar BC-103 Standard Bark Control Collar BC-102 PetSafe Standard Bark Control Collar PetSafe UL-275V PetSafe UL-275M PetSafe UL-275D PetSafe UL-250 PetSafe RF-275 Invisible Fence: Invisible Fence Micro Lite Invisible Fence R21 Invisible Fence R51 Invisible Fence Fence Mink Innotek: Innotek SD-2225 Pet Guardian: Pet Guardian PG-250 Other Compatible Brands: Perimeter Dog Watch Contain A Pet Pet Stop