- Oval Shape porthole for Boat/Yacht/RV/ Cars - Strong ABS Molded Design, Anti-Aging, Anti-Corrosive, Resistant. - 4mm(0.15inch) thickness tempered glass,Strength, Clarity, and Chemical - Corrosion free synthetic fittings and durable water-tight rubber seals - Easy "click-in" construction,The two fittings can be loosened to allow you to swing open the porthole - Easy to install, pre-drilled countersunk fastening holes (screws not included) Specification: Material: Stainless Steel Outer Size: 400x200mm/15.75x7.87inch Inner Size: 338x145mm/13.31x5.71inch Package Includes: 1 Piece Oval Porthole Note: Please allow 1-3mm deviation due to manual measurement.(1mm=0.04inch) Please check the details and make sure it will meet your need before purchase.