Many of the hoses in our range will come already fitted with some type of end fitting so you can start connecting up to your air compressor and tools, any addition couplers you need will be the same size.
If you're still unsure what size you need, it's simple, the circumference of your hose is the size coupler that you will need. You can use this quick trick to work out the circumference of your hose;
Take your hose and a length of string
Wrap the string around the hose
Keep the string running around the diameter straight and true
Mark the string across both ends
Layout the sting next to a tape measure
Read the length of the string from mark to mark
This will give you the circumference of the hose
Take this length and divide by PI (3.1416)
This will give you the diameter of the hose
There are many different types of air fittings but most air tools use one of just a few types of connector. The main things to consider are the fitting type and the thread size. Common fixing types include ¼” BSP, ¼” PCL and 3/8” NPT.