DOCO® O-Ring Collar is made from high-quality nylon and plastic fittings. The unique placement of the fully attached O-ring allows for easy chain attachment. The design ensures a release system that allows the clasp to be held and lets you reattach the collar before the collar strap is removed from your dog. Identification ring for attaching your animal's ID. Feel safe and comfortable with this collar. *Compatible with DOCO® Nylon Series: DCSN1048, DCSN1072, DCS1148, DCS1172, DCS2048, DCB1122, DCB1148 Special Features: - 100% high-quality nylon with single thickness - Higher tensile strength than polyester - Resistant to mold, aging, and abrasion - Quick and easy-release plastic clasp - Triple-slide system for easy size adjustment - Heavy O-ring to withstand chain and ID tag - Bright colors easily visible at all times Size Chart