Molded-in lid gasket. No fighting with O-rings. Assures a watertight seal every time. Tuf-Tite makes a full line of risers and accessories for pre-cast applications. Designed specifically to fit Tuf-Tite products.Available in 12, 16, 20 and 24 diameters. Comes in green. Includes stainless steel safety screws. Ideal for septic tanks. 16″ diameter domed lid.Shape: Domed. Style: Compact. Brand: Tuf-Tite. Color: Green. Material: High Density Polyethylene. Date First Available: April 11, 2014. Best Sellers Rank: #71,102 in Health & Household. Customer Reviews: 4.7 out of 5 stars 236 ratings 4.7 out of 5 stars. : B00JMNCEW8. Batteries Required?: ?No. Batteries Included?: ?No. Included Components: ?1. Item Package Quantity: ?1. Is Discontinued By Manufacturer: ?No. Item model number: ?Tuf-Tite 16″ Septic Tank Lid. Package Dimensions: ?17.5 x 17.5 x 1.2 inches. Item Weight: ?2.44 pounds. Part Number: ?1. Manufacturer: ?Tuf-Tite. Number Of Pieces: ?1. Shape: ?Domed. Style: ?Compact. Brand: ?Tuf-Tite. Color: ?Green. Material: ?High Density Polyethylene.