IST Dolphin Tech Stage Bottle Rigging allows for setting up of a stage bottle to be carried alongside the torso. Sturdy rubber bands with pull tabs are designed for use with 7 – 7.25" diameter cylinder (SBR-2). The heavy duty stainless steel pipe band is enclosed in a nylon sleeve to protect the cylinder’s surface finish. Lengthwise 1 inch nylon webbing strap offers a swiveling spring snap clip at each end. All metal parts are constructed of marine grade, corrosion resistant stainless steel. Perfect for cave and wreck divers. For Cylinder 177 mm~184 mm(7”~7.25”). Webbing : 2.5 cm(1”) nylon webbing. Snaps and cylinder band : Stainless steel.