Bilco drainage channel frame j-4al, single leaf, 316 stainless steel hardware, 36″l x 36″w constructed with a channel frame for use in exterior applications or in those situations where there is concern of water or other liquids entering the access opening. Type j-al floor access doors feature aluminum construction, type 316 stainless steel hardware, and engineered lift assistance for easy one-hand operation. Available in a number of standard single leaf and double leaf (type jd-al) sizes fully enclosed compression springs counterbalance the cover for smooth, easy, one hand operation.