C4-K1.8R-6R8 C4-K1.8R-6R8N 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