Image API Drop Adapter with Sight Glass Markets Petroleum Cargo Tanks Jump to Section Product Options Related Products Product Options Part Number Size Seal Material 4530SG 3" Baylast™ flat gasket Aluminum 4530SGV 3" FKM flat gasket Aluminum 4540SG 4" Baylast™ flat gasket Aluminum 4540SGV 4" FKM flat gasket Aluminum Related Products Image 6200-Series Side-Lever Type Drop Elbow Image API Drop Adapter Image API Drop Adapter Repair Kits Image API Load Only Valve Image API Load/Unload Valve Image Gravity Drop Adapter Dust Cap