ISO Proof Coil Chain is low carbon steel general purpose/anchor chain with an ISO short pitch link. It is used in applications where high tensile strength is not required. Not calibrated for windlass use. Sold in Standard Pack lengths only. Not currently sold by the foot. ISO Grade 30 Hot-Dip Galvanized Proof Coil Chain Specifications Size Inside Link Length MWL Weight Standard Pack 3/16" .97" 800lb. .41lb./ft. 250' 1/4" 1" 1,300lb. .72lb./ft. 141' 1/4" 1" 1,300lb. .72lb./ft. 800' 5/16" 1.12" 1,900lb. 1.03lb./ft. 550' 3/8" 1.23" 2,650lb. 1.53lb./ft. 400' 1/2" 1.5" 4,500lb. 2.66lb./ft. 200' 5/8" 1.9" 6,900lb. 3.88lb./ft. 150' 3/4" 2.2" 10,600lb. 5.76lb./ft. 100'