A stouter plastic tube with lining and a cavity in the tail to take the eye of a treble.5 or 10 tubes per packet. 4 cm. (1.5'') or 4.5 cm. (1.75'') or 5 cm. (2'')

Eumer plastic and silicone tubes are so durable that they withstand very cold water, but they are soft enough to stretch over the eye of your hook.