Review on Canplas 193066 Countersink 6 Inch White by Trae Joubert

Fits standard 6 inch drain cleaning plug. It also has a seal to keep critters and roots out. It has a lower profile than square plugs. Above. To tighten it (and presumably take it off someday), take a 2x4 and drill a hole along the long axis. Covers with a proud square for lawn mowers, I agree.