J-Block® Square Mounting Block Mounting Surface. 5" x 6" Trim Ring Dimensions. 7-1/4" x 8-1/8" J-Channel I .D. 1/2" adjusts to 1-1/4" Knockouts: Round: 4" Diameter. Rectangle: 2-3/8" x 3-3/4"
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Model UNIBL0CK PC
