Manufacturer SKU: 1409-CBN. Vitreous china is glazed and double fired for durability and stain resistance.. Inverted pyramid shape with four walls tapering inward towards the drain (drain not included). Designed for undermount use. Front overflow. No faucet drilling. Countertop, Faucets and Drains Not Included. 15 in. L x 21 in. W x 8 in. H. Installation Instructions. Cutout Template DECOLAV"s Classically Redefined Pyramidal Undermount Bathroom Sink is a fresh design alternative to the standard rectangular undermount. Its four walls taper inward towards the setback drain to form an inverted pyramid shape.