Whether you need a cylinder cam band for your pony bottle or your primary cylinder XS Scuba has a cam band for all your needs. The Cam Bands - Pair - Short Length fits 4.0" to 5.0" (10.2cm to 12.7cm) diameter cylinders, and the Cam Bands - Pair - Standard Length fits 6.9" to 8.0" (18.4cm to 20.3cm) diameter cylinders. Both bands use nylon with glass fill injection-molded corrosion resistant cam buckles with stainless steel wire. Webbing is 2" (5.1cm) wide nylon with hook and loop to streamline the strap once cam is engaged to hold cylinder. Buckle is anchored to the webbing with a double box stitch for security and durability. The Standard Band measures 40" (101.6cm) and the Short Band measures 26" (66cm).