Buckle is constructed from 316 stainless steel with higher lift on the rolling edge of the buckle to increase cam force; higher lift causes the buckle to snap into place eliminating unintentional release of the band assembly. Cam Band uses standard 2 (5.1 cm) Nylon Webbing and is easy to adjust to different cylinder diameters from 6.9 to 8.0 (17.5 to 20.3). The XS Scuba Tank Bands with Stainless Steel Cam Buckles (Pair) is popular because customers like the following qualities of the XS Scuba Tank Bands with Stainless Steel Cam Buckles (Pair): Easy To Use, Functional, Solid Construction.