3.00 OD, TWIN PUMPER, SQUARE HOLE

3.00 OD, TWIN PUMPER, SQUARE HOLE，TUNGSTEN

3.25 OD, TWIN PUMPER, SQUARE HOLE

3.25 OD, MSI HYBRID, SQUARE HYBRID

3.50 OD, MSI HYBRID, SQUARE HYBRID

3.75 OD, 2250/2500, FLAT CENTER DRILLED