Specification - R1100-PJ - Promenade Deck Drain with Stainless Steel Perforated Extension MIFAB series R1100-PJ lacquered cast iron roof drain with anchor flange, cast iron water proofing membrane clamp ring, stainless steel perforated extension and standard 1" (25) thick, 8" (203) square adjustable ductile iron tractor grate.