C4-K1.8R-560 C4-K1.8R-560M C4-K1.8R-5R6 C4-K1.8R-5R6N C4-K1.8R-680 C4-K1.8R-680M C4-K1.8R-68UH C4-K1.8R-6R8 C4-K1.8R-6R8N C4-K1.8R-820