Designs for Standard Computer Collars®
Traditional solid color nylons, colorful woven jacquard patterns from Lupine, playful grosgrain ribbon designs by Up Country and waterproof UltraSport neons comprise our vast pre-punched replacement collar collection. Shop a variety of colors and styles all pre-punched and sealed to fit your Invisible Fence® Brand R21 Computer Collar®.
Looking for extra small or extra large sizes? Try shopping UltraSport or our Solid Replacement Nylons.