304 grade stainless steel construction with a stainless steel exterior. Self-supporting & trimming with rigid welded construction to ensure strength & Longevity. Required for installations in combustible enclosures. Designed for 38" Bull grills (brahma, renegade & other 38" Grills manufactured by Bull). cut-out dimensions: 45 3/4" W x 9" H x 22 1/8" D. Overall dimensions: 45 3/8" W x 10 1/2" H x 22" D.