This is the Riffe Torpedo Pro Spearfishing Dive Float with Flag FeaturesL Diver Down flag and base for safety Schrader Stem Valve for easy inflation with a bike pump Dump/relief valve prevents overinflation Deflates with just the pull of a tab 53-lb. Maximum lift capacity Webbing straps for use as a speargun breakaway float Industrial-strength 840D nylon construction 34 x 9.5" x 9" when inflated, 20L Stay safe during your dive. Measuring in at a large 34" x 9.5" x 9" when inflated, the Riffe 20L Torpedo Pro Float with Diver Down Flag sends a clear signal to nearby boaters that divers are below and to stay clear. The Torpedo Pro Float is made from industrial-strength 840D nylon and features a Schrader Stem Valve for quick and easy inflation with a bicycle pump or air compressor at gas stations."