Product Description For use with high pressure grease systems Includes 6" extension tube - 1/8" NPT(m) and high pressure Zerk coupler Operating Pressure: 7,500 psi Grease Inlet: 1/4 NPT(f) Shipping Weight: 2 lbs. Product Reviews Write a Review Write a Review × ATD Control Valve Heavy Duty ATD-5218 Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email Required Review Subject Required Comments Required