[Durable Material]420D TPU Coated Cloth Inner Shell and 1050D Cordura Outer Shell and TPU Connector and ABS Safety Valve and Copper Plated Air Eye and Rubber Colorectal Tube.[Proper Size ]Donut(L x W): 25.2 x 16.93inch Low Pressure Length: 21.65inch Rubber Colorectal Tube Length: 11.81inch Threading Slot(L x W): 5.12 x 0.28inch.[Full Diving Donut Wing Single Tank]Comes with 30lbs Donut, Outer Shell, colorectal tube, K-valve and low pressure hose.[Easy to Use]Removable soft bracket is provided for cylinder support and 4 threading slots in the middle are convenient for using.[Fits for Diving]Great Scuba Dive Equipment, Provides you with buoyancy control while you are Scuba Diving and Snorkeling.color:BlackMaterial:nylonsize:Inflated . 38 x 64 x 15cmPackage Contents:1 x Diving Donut WingOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.