Up for sale is a NEW 'TYPE M1' FLAT OVAL DUCT ACCESS DOOR by NAILOR INDUSTRIES INC. (M/N: 0800) with NOMINAL SIZE: 8"W x 5"H with product specs outlined below ~ please feel free to email me for price, pick-up or shipping information. * Ultra-low leakage design * Suitable for use in High, Medium or Low Pressure Systems * Standard construction Is galvanized steel * Standard mounting for externally Insulated, Internally insulated or plain metal ducting (also suitable for duct board systems) * Simple, progressive, camlock operation * 1" thermal and acoustic insulation * Leakage tested to 8" wg. static pressure