Perko Gas Deck Fill Cap Only 1-1/2" Black 1270-DPG-99A by Perko $27.50 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Perko Gas Deck Fill Cap Only #9-1270DPG99A Size: 1-1/2" NPT Black plastic cap with o-ring and retainer Spare Screw-In Cap for 1270 Series Deck Plates & Fills