$14.99at WaterPORTBuyWaterPORTStandard Cap$14.99WaterPORT$14.99BuySaveShareWaterPORT profileThe creators who use it, or GearCred, may earn a commission when you buy through these links, at no extra cost to you.From WaterPORTStandard 2.25 inch cap for large top port. Fits all WaterPORT tanks.