Greenfield Products 2114-B 3/16" X 4' Black Marine Anchor Chain Anchor chain keeps anchor in correct setting position for stronger hold 3/16" x 4' PVC-coated marine anchor chain Recommended Boat Size (Winds up to 30 knots): 800 lbs Highly elastic PVC coating stretches to all chain to bend and coil For best performance, use this product with steel shackles to connect Anchor - Chain - Line