Kohler Co. Manufactures One-Piece Toilet with Quiet-Close Seat & Cover, K-19056T-S-0. Kohler Co. Is an ISO-9001 certified manufacturer of Bathroom Suites, ensembles and other toiletries. This one-piece toilet is designed with 750 x 390 x 665 mm dimension. It has P-Trap 180 mm and S-Trap 100 to 305 mm. This comes in white colour.