Whether it is to seal or conceal instrument installation or access holes this durable cover plate molded from UV stabilized acetone-resistant polypropylene ensures a reliable seal while still allowing easy removal for visual inspection. Suitable for hole sizes up to 4 inches in diameter. Requires four #8 fasteners.Seachoice is committed to delivering quality marine accessories and OEM replacement parts to satisfy fishing boating and watersports enthusiasts worldwide. Seachoice is run for and by boaters offering a wide-ranging product line while remaining affordable.