YYST 4 X Stainless Steel White D-Ring Pad/Patch for PVC Inflatable Boat Raft Dinghy Kayak Quantity:4 pieces Color: Gray For PVC Inflatable Boat Raft Dinghy Kayak. Diameter of Patch : 11 cm4.25 inch Diameter of D-ring : 38 MM1.5 inch Made of PVC and stainless steel 304. Instruction Included.