This is the XS Scuba 7 ft SMB Surface Marker Buoy Dive Signal Marker Features: 7&'; long x 15" circumference, 5" diameter Mil-Spec, urethane backed, nylon material SOLAS reflective tape on both sides for maximum visibility Elastic loop at top for chemical light attachment Stainless steel D-ring at top for slate attachment Lifting handle at top of tube 2" Diameter overpressure relief valve with pull for manual release (BP52) Combination oral and BC QD inflator Anti-spill bottom with baffle to allow easy fill from any second stage Remains inflated until you empty it Rolls up to compact size and stays closed with Velcro strap Lifting strap with stainless steel D-ring at bottom 18" step-thru leg harness with stainless steel D-ring 50 lbs. of positive lift Use as a marker buoy or a safety signaling device"