Wide Application: For S, T, , and series pump numbers including S12D, S12DAB, S24D, S32D, S115A, S12, 52A, S32, T12, T24, T32 model. Technical Description: for /for Sealand Duck Bill Valves Kit comes with two 1-1/2Inch valves for "T" and "S" series pumps. These valves are a critical component of the VacuFlush system. Designed to prevent flow back in vacuum and discharge pumps and should be replaced frequently. Note that "S" series vacuum pumps, low profile vacuum pumps, and the VG2 vacuum pumps require 4 valves . The "T" series discharge pump requires 1 kit (2 valves) Tough and Well Made: Made of high-quality rubber, reliable use, and longer service life, Is your perfect choice. Please note:There is a slight color difference or difference in kind, it does not affect the use, please do not mind, thank you! Colour:Black Material:rubber Package Contents: 4 * for valve kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.