Finished floor / shower drain strainers with 4″ machined N.P.S.M. threads. Available in 5″ x 5″, 6″ x 6″, 8″ x 8″ or 10″ x 10″ sizes and in either light duty nickel bronze (under 2,000 lbs.) or in heavy duty Type 304 stainless steel (5,000 – 7,499 lbs.). Furnished standard with vandal resistant allen key screws.