Ferrule Tubing / Tie Rod Sleeve

Ferrule tubing is used to space shutters and to recover expensive concrete shutter tie-rods (Ferrules / Tie Rods). The inside diameter of the Ferrule tubing needs to be at leat 1mm greater than that of the tie-rod (Ferrule) being used to fix the shutter. Ferrule tube end cones are inserted at each end to seal off the hole in the shutter