step 1 Drag each selection from left to right and drop into the favorites panel. step 2 Click the "Order Samples" button and complete the shipping form and final selections. Samples are shipped in 2 to 5 business days. knoll table 2481D - natural & coated marble tops .75" thick tops. Coated marbles have transparent polyester coating to help eliminate stains. Natural marbles feature a penetrating sealer. knoll table 2481D - wood veneer tops 1.2" thick veneer top. knoll table 2481D - white laminate top 1.25" thick satin finish smooth laminate.