Provides convenient passage for specimen from patient area to laboratory. Mounts in walls 3-6" thick with adjustable flange. Type 304 stainless steel, satin finish. ADA compliant interlocking mechanism prevents both doors from being open at the same time; provides sight barrier. Removable stainless steel spillage tray. Rough Wall Opening 12-3/8" W x 12-3/8" H (314 x 314mm)