Unit is designed for installation in countertop. 4-1/2" (114mm) minimum clearance below mounting surface is required. Mount unit through a cutout specially ordered from countertop manufacturer or field cut. Dimensions of cutout are to be 11-1/4" wide x 4-1/2" high (285 x 115mm). Adjustable mounting tabs accommodate mounting thicknesses from 3/4" to 1-1/2" (19 to 38mm). For complete installation instructions, see Form No. 527-69, packed with each shipment; also available in advance on request