gear pump is made from high strength aluminum 1.CBT means Product ... 20Map3.'4'means Geer modulus=44.There are such nominal displacement(mL/r) for choose :10,12.5,14,16,19 ... ,26.5,30,325.Mounting is oval6.Joining port: L(screw) or F(flange)7.Shaft end supplies:P(flat spline ... (left or conterclockwise),R(right or clockewise ommitted) HYDRAULIC GEAR PUMP CBT-F4type