Compatible with New Valley Sea Kayak (formerly Valley Canoe Product, VCP) Round Hatch Cover fits Valley's Round Day Hatch Rims and older models round hatch rims.;Compatible with Necky kayaks, older Wilderness Systems kayaks, Nigel Dennis kayaks and Valley kayaks.Compatible with Fit the following models: Chatham 16 Poly/Composite, Chatham 17 Poly/Composite, Chatham 18 Composite, Elaho.Size 9 Dia outside 7.5 Inside Dia.Replacement and high quality, replace your faulty, cracked or broken round hatch cover.This product is made of high quality plastic material. Please allow 13cm (0.41.18/) difference due to manual measurement and slight color variation for different display setting. Due to the light and screen difference, the item/'s color may be slightly different from the pictures. Please understand.High Quality: Made of High Quality Material, the Marine Hatch Cover is Durable for Long Service Life.Impact and Corrosion Resistant.These Hatch Covers Help to Reduce UV Damage to Your Hatch as well as Minimize the Light Entering Your Boat.