All Models Are UL Classified For A 1-Hour F-Rating. Deep Drawn Manufacturing Process and made in the USA. Extension Rim Protrudes From Nailing Flange 7/8''. Total Of Eight 1/4'' Mounting Holes (4 On Each Side). Sides Are Tapered To Allow For Nesting Of Multiple Boxes. Surface Is Clean Of Any Oil Residue And Will Adhere Paint. Instruction Sheet Attached To Rear Panel. All Models Incorporate A Gas Port Knock-Out
Standard/Approvals: UL Classified