Mack 9538-25112B Valve Height Control PAI 803718CROSS REFERENCE: 9538 25112B APPLICATION: Mack Multiple Use Application DETAILS: Includes Fittings (2)840075 BRAND: PAI 803718 Mack 9538 25112B Valve Height Control PAI 803718 intended for replacement truck and aftermarket truck use. Ensures stable seat height adjustment for heavy duty comfort. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over 50 years of experience in the heavy duty