C4-K1.8RA-270 C4-K1.8RA-270M C4-K1.8RA-2R2N C4-K1.8RA-2R7 C4-K1.8RA-2R7N C4-K1.8RA-330 C4-K1.8RA-330M C4-K1.8RA-390 C4-K1.8RA-390M C4-K1.8RA3R3