This piston is constructed of oil-resistant polyurethane bonded to a solid metal hub. As fluid pressure increases, the urethane surface of the piston expands against the liner to complete the seal, even in the enlarged diameter of a worn liner bore. This piston has longer life than replacement rubber pistons.

The pump types offered include the following:
Jewel pump: F-500, F-800, F-1000, F1300, F1600, FB-1300, FB-1600, D-375, D-700.
Lanshi pump: 3NB-1300C, 3NB-1000, 3NB-1000C, 3NB-800.
Qingzhou pump: SL3NB-1300A, QZ-1000, QZ-500, QZ-350, QZ-800, SL3NB-1600.
Honghua Pump: 3NB-1600F, HHF1300/1600.
Country: T-500, T-800, T-1000, T-1300, T-1600, A-350PT, A-560PT, A-600PT, A-850PT, A-1100P, A-1400PT, A-1700PT.
Glendenford pumps in the United States: PZ-7, PZ-8, PZ-9, PZ-10, PZ-11.
U.S. National Oil Well Pumps: 7-P-50, 8-P-80, 9-P-100, 10-P-130, 12-P-160, 14-P-200, 14-P-220, K-700, K-700A, K-500, K-500A.
Russian mud pumps: 8T-650, UNBT-600, UNBT-950, UNBT-1180L, UNBT-950A, UBT-400, BT-600, UB-590, UNB-600, 8T-310, 8T-650.

Honor