Universal flush access door (stainless steel) for walls & ceilings. Designed for installation in all types of flush surfaces. This unit is good for exterior applications or areas where corrosion or moisture is a concern. 1 Latch. Stainless Steel Finish. 9-5/8″W x 9-5/8″H Outside Flange Dimensions. 8-1/4″W x 1-1/4″D x 8-1/4″H Return Flange Dimensions.