Rod Support 18" - Ceiling Support shall be fabricated of alloy 18-8 stainless steel type 304 with No4 satin finish and consist of a flat exposed mounting flange, tubing and sleeve. Support shall be 18" (457mm) from mounting surface to center line of rod sleeve or asmodification length specified below. Unit shall be all welded construction. Flat flange shall be 3" (76mm) dia. by 1/8" (3mm) thick and shall be provided with three (3) countersunk holes to accept 1/4 screws (supplied by others).