Model Description MS-1-04-1/4-F-E 1 2 3 4 5 6 1.MS: Model Series 2.Filter Medium Length: 10 inches 3.Filter Medium Number: 4PCS 4.Pump Motor: 1/4HP (or 1/6HP, 1/8HP, 1/12HP, 1/2HP etc.) 5.Pump Material: F-FRPP, P-PVDF 6.O-Ring Material: V-VITON, E-EPT MS-2-18-3-F-U-E-C-TB 1 2 3 4 5 6 7 8 9 1.MS: Model Series 2.Filter Medium Length: 20 inches 3.Filter Medium Number: 18PCS 4.Pump Motor: 3HP (or 1HP, 2HP, 5HP etc.) 5.Pump Material: F-FRPP, P-PVDF 6.Inlet/Outlet Joint Type: F-flange, U-Union 7.O-Ring Material: V-VITON, E-EPT 8.Filter Medium Type: T-Filter Tube With Pressure Plate, C-Filter Element With Pressure Plate, B-Filter Element With Screw Nut, P-Filter Paper, K- Carambola Shape Cloth 9.Pump Model: TB Series, or TCH Series