Navy anchors 1.flukes to dig in and hold firmly in sand and mud 2.size: 5lb, 10lb, 15lb, 20lb, 28lb 3.finish: silver, PE The characteristics of navy anchor:∴ Gray cast iron∴ Available coated with aluminum-painted finish or PE coated finish∴ Many sizes are available. Aluminum-painted: 5LB, 10LB, 15LB, 20LB,28LB PE coated: 5LB, 10LB, 15LB, 20LB,28LB Marine Boat Anchor