steel roof hatch designed to provide convenient, economical access to the roof of a building. Each unit comes with an insulated, self-flashing, 12″high curb and a staple for a padlock on the inside and outside. Each unit is supplied with lift assisting mechanisms and an automatic hold open arm. Self latching zinc plated outside t handle & inside stainless steel slam lock. 1 latch. Gray finish. 32″w x 32″h outside flange dimensions. 24″w x 12″d x 24″h return flange dimensions.