We use an Anti-Aging, Ultraviolet-Resistant ABS Thermoplastic with robust reinforcement.Their rugged design provides performance that you can rely on for years.Non-slip surface ,Durable sealed rubber strip.Removal knob design,Very Convenient Come with 5mm screw hole diameter,Easy to install.Design:Removal knobSurface:Non-slipItem type:Boat Accessories MarineItem name:Marine Access HatchItem name:Boat Access HatchItem type :Boat HardwareItem type :Yacht AccessoriesItem name :Marine Access/Deck HatchItem name :Boat Access/Deck Hatchcolour:whiteMaterial:plasticsize(L x W x H):425 x 315 x 2cm/167 x 124 x 08 inchPackage Contents:1*Access HatchOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.