C4-K1.8R C4-K1.8R/6R8 C4-K1.8R100 C4-K1.8R-100 C4-K1.8R-100M C4-K1.8R-101 C4-K1.8R-101M C4-K1.8R-120 C4-K1.8R-120M C4-K1.8R-121