Lake Petro supplies forged and casted steel pulsation dampeners which are inter-changeable and compatible with: Hydril series "K" dampeners Emsco series "PD" dampeners Bomco series "KB" dampeners These units are dependable and reliable with API connections K-10,3000 psi, K-10,5000 psi, K-20, 5000 psi, K-20, 7500 psi, KB-45, 5000 psi, KB-75, 5000 psi, PD-45, 5000 psi, PD-55, 5000 psi