Feature:Specification:Perfect for access to the various storage areas on board and for inspection of fuel lines, electrical cables, gauges and controls as well as access to the engine.Features:Fine quality ABS material, anti-oxidation, sunshine-proof, long-term use does not age or fade, and the service time is longer.Separate design of cover and chassis for easy observation and maintenance.The product is waterproof and dustproof, corrosion resistant, impact resistant, high and low temperature resistant, suitablfor various environments.Reinforced design with a nonslip surface.Easy to use.Specifications:Size: 4in, 6in, 8in (optional)Color: black, white (optional)Material: ABSInner diameter:4in: 101mm6in: 151mm8in: 200mmOuter diameter:4in: 143mm6in: 198mm8in: 250mmPackage size:4in: 160 * 160 * 40mm / 6.3 * 6.3 * 1.6in6in: 210 * 210 * 40mm / 8.3 * 8.3 * 1.6in8in: 260 * 260 * 40mm / 10.2 * 10.2 * 1.6inPackage weight:4in: 130g / 4.6ounce6in: 240g / 8.5ounce8in: 350g / 12.3ouncePacking List:1 * Deck Inspection HatchCoverPackage List:1 * Deck Inspection HatchCover