refrigeration connecting rods big bore*small bore*center 40*19*135 39.75*19*135 39.5*19*135 refrigeration connecting rods We are specialized in manufacturing aluminum refrigeration connecting rods,air compressor connectingrods,oilless connecting rods,the technics include:gravity casting, forged,squeeze casting,pressure casting.Presently.the connecting rods have more than 300types.