Includes 8 screws for each item in the bundle (24 screws total), the 20x12 riser, the 20-inch domed lid, the 20-inch ring adapter, and the 20-inch safety lid; everything you need for your septic tank. All items come in green with the exception of the safety lid that is yellow. 
Green, 20” TUF-TITE lid seals to the riser with molded-in lid gasket to assure a watertight seal every time. The lid is secured with eight stainless steel screws and a horizontal screw to assure safety. This is a strong lid that is very attractive. Designed to fit specifically on Tuf Tite systems.
20” x 12” riser for raising underground tank access to grade. This riser is compatible with the TUF-TITE lid.

20-inch ring adapter 24 TAR Connects TUF-TITE riser or lid to the tank. Made with High-Density Polyethylene
UPC 850013594146

20 in safety lid: Access hole allows pump-out without removal

• For safety, the lid can be filled with concrete. "Concrete Keepers" lock the lid into the concrete.
• Safety Lid sits on riser ledges with matching screw holes.
• Color: Yellow