MV-Disc is our first product in moulded plastic parts. MV Disc gives your fly more volume. And when fishing in slow streams you always have contact with your fly.. For seatrout fishing at night this is a little revolution. The summer 2015 we testet it and with great result.. It comes in 2 sizes with a funnel hole in 1,9mm so the collar on the liner and disc is smooth. 10 in a pack