Fangrui Product Details 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 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