Item Type: Air Compressor Piston Connecting Rod_x000D_Material: Cast aluminum_x000D_Model: 20 x 32 x 137mm_x000D_Small Hole Diameter: Approx. 20mm / 0.8in_x000D_Large Hole Diameter: Approx. 32mm / 1.3in_x000D_Center Distance Between Two Holes: Approx. 137mm / 5.4in_x000D_The Shortest Distance Between Two Holes: Approx. 113.5mm / 4.5in_x000D_Applicable Cylinder Diameter: Approx. 90mm / 3.5in_x000D_Purpose: Air compressor and pump accessories 1Made of high quality cast aluminum material, The surface of the casting has been sandblasted, durable and long service life 2The casting size tolerance is CT6 level specified in GB6414 which has standard specification and the wrong value is not more than 1 3With strong rigidity, especially for the big head end, the whole is light weight, small inertia force 4The connecting rod is suitable for 90mm cylinder diameter, simple and convenient to install 5Professional design and reasonable structure, good replacement for air compressor1 xConnecting Rod