12" x 12" Fire Rated Un-Insulated Access Door with Flange Approved by Underwriters Laboratories (UL) for 1 12; hours label in walls and ULC for 2 hours label in walls. Designed to maintain continuity in a 2-hour fire barrier wall, the FB-5060 should be used whenever it is necessary to provide access in fire rated walls, when temperature rise is not a factor. Application: Designed to provide access in walls, while maintaining an invisible, architecturally pleasing appearance Product Features Product Features Concealed hinge Self-closing Self-Latching Inside latch release BA-FB-5060 Access Door Specifications: Door / Door Frame: Steel 16 gage door, 16 gage mounting frame. Flush to frame with reinforced edges, flange to be 1" wideHinge: ConcealedFire Rating (Walls): UL 1-1/2 hour "B" label. ULC 2 hour "B" label. (optional)Max size 36 x 48Standard Latch: Universal self-latching bolt, operated by either a knurled knob or flush key. When master keying is required, doors can be prepared for rim or mortise cylinder locks.Finish: Steel: 5 stage iron phosphate preparation with prime coat of White alkyd baked-on enamel. Product video