Features. Worktop height extension. Raises table/bench tops to a comfortable 36 in. countertop working height. Allows use of P-top accessories with easy installation. Dimension - 9.4 L x 8.7 W x 5.8 H in.. It includes 6 pieces. Raise table/bench tops to comfortable 36″ counter top height Allows use of p-top Accessories Does not reduce unit load rating.worktop height extension for the Centipede support system.