J-BlockÂ Mounting BlockThe J-Block mounting block provides multiple uses, including the ability to easily and attractively mount light fixtures and receptacles. Manufactured with ultraviolet-stabilized color, minimizing the effects of exposure to the elements. Rich textured appearance. Surface dimensions: 7 IN x 7 IN. Flange dimensions: 8-1/2 IN x 7-1/2 IN. J-channel internal dimension: 3/4 IN adjusts to 1-1/4 IN. Knockouts: Round 4 IN diameter, rectangle 2-3/8 IN x 3-3/4 IN.No. BLOCK PW: WhiteNo. BLOCK PA: AlmondNo. BLOCK EQ: GrayNo. BLOCK PC: ClayNo. BLOCK A7: TanNo. BLOCK PB: CreamView Alcoa Home Exteriorss website for details and warranty information on this product.
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