This is the XS Scuba Tank Cam Strap with Stainless Steel Buckle Features: Cam buckle made of marine grade 304 stainless steel The buckle separates for easy removal of BC from cylinder Tension can be adjusted while on cylinder Standard length, as found on SeaBlazer BC, fits most BC&';s that have standard backpacks Shorter length, as found on Phantom BC, fits most BC&';s without hard packs The XS Scuba cam strap with separating stainless steel buckle is the easiest, most secure way to attach your cylinder to your BC