calvana (3-pack) calvana 4” round atrium drain grate cover, compatible with nds 78a, fits 4” sewer and drain pipe fittings, perfect for small lawns, landscaping, patios, extra tough polyethylene, black is up for auction in Patio, Lawn & Garden. The current bid is $1.00, 94% below the $16.99 MSRP, in Good Condition. Bid on this item at our Mason - Reading Rd - Suite G location before the auction closes.