Sea-Dog Stainless Steel Chain Stopper - 5/16" - 3/8" [321825-1] Boat Outfitting | Cleaning The 1800W is designed for

The 1800W is designed for demanding RV and marine conditions

1/2" NPT Bronze 90 Degree Pipe to 1/2"-5/8" ID Hose

Designed with an adjustable upper hinge for transoms with limited vertical space

eliminating driftback

and household spills

Sea-Dog Stainless Steel Chain Stopper - 5/16" - 3/8" [321825-1] Boat Outfitting | Cleaning The 1800W is designed forStainless Steel Chain Stopper 5 16" 3 8" Chain Stoppers help prevent damage to the windlass and reduce the risk of accidental free fall of the anchor while under way. Chain Stoppers mount alone or inside most bow rollers and work with your anchor roller to take tension off your windlass. Chain and rope should be secured at anchor when your windlass is not in use to avoid high loads the windlass was not designed for. 321820 fits chain sizes 3 16" 1 4".