Equal rabbets Made to Order Dimensions 18, 16, 14 Gage Fire Label: Underwriters Laboratories(Applied or Embossed) Warnock Hersey(Applied or Embossed) Factory Mutual(Applied Only) Sizes Available: Cased Opening 4-5/8" to 14" Depth Single Rabbet 3-5/8" to 6" 16 & 14 Gage 3-5/8" to 7-7/8" 18 Gage Double Rabbet 4-5/8" to 14" in 16 & 14 Gage 4-5/8" to 7-7/8" in 18 Gage