C4-K1.8R-820 C4-K1.8R-820M C4-K1.8R-8R2 C4-K1.8R-8R2N C4-K1.8RA C4-K1.8RA-100 C4-K1.8RA-100M C4-K1.8RA-101 C4-K1.8RA-101M C4-K1.8RA-120