MIFAB® Series K dome (specify material type) strainer with 4″ machined N.P.S.M. threads. Available in either light duty nickel bronze (under 2,000 lbs.) or in heavy duty Type 304 stainless steel (5,000 – 7,499 lbs.) and / or heavy duty cast iron (5,000 – 7,499 lbs.). Furnished standard with vandal resistant allen key screws.