Perko Bronze Thru-Hull Hose Connection w/NutThe Perko hose connections are made of cast bronze and grooved to retain bedding compound. A machined connection flange ensures a better fit against your hull while the bard is designed for hoses.Feature: Cast Bronze; Nut Included; Machined connection flange; Sizes Available: 1" 350-006-DPP; 1-1/2" 350-008-DPP; 1-1/4" 350-007-DPP;