D-rings with bases of PVC raft material are for use with a PVC or Urethane inflatable or ABS canoe. Larger model uses a 6-1/2" patch of 28-40 oz. material and a 2" D-ring, is also anchored by heavy floor material and sewn. Colors are sky blue, yellow, orange, gray, aqua, purple, or red. Use PVC Adhesive or Vyna Bond with MEK.