File:Crysknife prop with detachable 'blood tube' (1984 Dune film).jpg

Summary
Crysknife prop (wish special detachable "blood tube") from Dune (1984).

Prop description: "Crysknife with "blood tube". It is a painted and detailed solid one-piece prop (except for the blood-tube) and seems to be made of either hard rubber or some other semi-rigid material. It is 11 3/4" X 1 1/2", and the blood tube is approximately 48" long."

Source: DuneInfo.com - Lynch's Dune - Costumes and Props

DuneInfo.com disclaimer: "Image used with kind permission of John R. Ellis."