Schmidt K1 Ink converter. Piston Converter for plug-in assembly, plastic construction. Opaque ink reservoir. Standard international size. It is suitable for our following fountain pen.(RZ-FP18# classic fountain pen, RZ-FP30# classic elite fountain pen, RZ-FP50# large jr gentleman fountain pen, RZ-FP71# Churchill fountain pen, RZ-FP78# Magnetic fountain pen kit, RZ-FP233# manager fountain pen kits, RZ-FP234# retro fountain pen kits, etc.)( Item No. : 18#/30#/50#/71#/78#/89#/130#/233#/234#/272#/341#/478#/516#/529#). 

RZ-SK1C