Kelch 7J203622 12" Threaded Marine Gas Cap with Adjustable Screw Vent This New 12" Long Vented Marine Gas Cap Will Work On Many Plastic Remote Marine Gas Tanks Including non EPA Moeller tanks, Chilton, And Others Does not fit the new EPA Moeller tanks. These Marine Gas Caps Have The Adjustable Screw Vent In The Gauge Face Center PLEASE NOTE: THESE GAS CAPS ARE MADE FOR THE 12" DEEP, 12 GALLON PLASTIC TANKS IF YOUR TANK IS A DIFFERENT SIZE, PLEASE CONTACT US WITH YOUR TANK DEPTH ANY QUESTIONS, PLEASE CONTACT US THROUGH AMAZON