Push-one-way drain plug made by LIXIL・INAX, with a diameter of 54mm and a thickness of 19mm. - Product Management Number: B21-SVLAR2-W - Size: Diameter 54mm, Thickness 19mm - Brand: LIXIL・INAX - Product Name: Push-one-way drain plug Thank you for viewing. Purchased in September from the LIXIL official store. Due to incorrect purchase and non-returnable policy, I am listing it for sale. Brand new and unopened.