Quick-release buckles for replacement or additional use. Please note that these buckles will need to be sewn on. Sizing relates to the width of the strap the buckle will fit on. E.g. the 20mm buckle will fit on a strap with a 20mm width. The Tatonka Bison uses a 38mm buckle (waist belt) and 20mm buckles (chest belt, compression straps, etc). Made from Nylon Acetal 6.6. Only available in BLACK.