These sleeves are adhesive lined producing a strong, neat, light and water/vibration proof joint. They have a shrink ratio of 3:1 e.g. 90mm i.d. will reduce down to 30mm i.d. Supplied in pairs.
Duct Joining Sleeve 115mm Inside Diameter (Pair)
Duct Joining Sleeve 70mm Inside Diameter (Pair)
Duct Joining Sleeve 90mm Inside Diameter (Pair)