Q. Can I use the Hi-Flow Leader Hose Extension with your regular Hoselink retractable reels?
A. Yes, you can. The Hi-Flow Leader Hose Extension is fitted with 14mm Hoselink fittings, which are compatible with regular 12mm fittings. In fact, it may even assist with better water flow to the hose reel. 

Q. Can I use a Leader Hose Extension to extend the main length on my Hoselink retractable hose reel?
A. You can use the leader hose extensions to add additional length to the main length of your hose reel hose. However, the additional length will not retract into the casing as it's only designed to hold the amount of hose it's pre-fitted with.