This is O.E.M. Authorized part RP21904 a Genuine Delta plastic repair part Works with specific Delta soap dispensers such as RP1001, RP37039, RP38671 and RP50813 For use with the following series: Victorian, Leland, Saxony, Palo, Signature, Holds 13 ounces For technical assistance, contact 1.800.345.DELTA Refillable from above the deck Genuine Delta plastic repair part For use with the following series: 100, 110, 155,156,157,158, 172,173,174,176,178, 186, 187, 200,275 300, 400, 400-D, 470, 472, 473, 473-SD, 474, 476, Holds 13 ounces For technical assistance, contact 1.800.345.DELTA Refillable from above the deck Genuine Delta plastic repair part For use with the following series: 100, 110, 155,156,157,158, 172,173,174,176,178, 186, 187, 200,275 300, 400, 400-D, 470, 472, 473, 473-SD, 474, 476, Holds 13 ounces For technical assistance, contact 1.800.345.DELTA Refillable from above the deck Works with Delta soap dispensers