Made from high-quality titanium, these collars combine great looks with dependable strength, but with substantially less weight (40% less than our stainless steel collars) Our Titanium Collar Collection is 100% hypoallergenic and is perfect for those who have metal allergies. Suitable for 24/7 wear. Thickness 6MM Weight: 1.6 oz to 2.2 oz Depending on the size ordered Stock Number: 3131-Titanium Comes with an allen key and 2 extra screws This collar is Titanium and has no metal alloy. Optional ring sold separately. Leather ring recommended for color collars as there is no chance of scratching. Measure the center of your neck and add 1-2" for best fit. In stock and ready to ship.Discreet Domestic Shipping