There are several types out there, the larger type supply like he showed is typically the 5" size. This is one piece for the most part. You really need to ask for the 1 3/4 or the 2 1/2 size. A lot of this is two part( the type now failing as most is 10-20 yrs old). Throw the inner liner away, it is rubber lined and will heat up from the friction. The outer liner works very well if it is the cotton or even blended due to weave is not water
As you can run lines inside the 1 3/4 without a issue up to nearly 10 ft. I know that is what I use. And no, i dont split it, i leave it intact so it cant slip off or have to have zipties to hold it in place.
Check with your local departments, (logistics) and ask when they do the annual hose testing. They will most likely give you all you can carry. But be warned, it adds up in a hurry and dont load 15 rolls into your car. The 5" is around 100lbs a roll, and even small stuff will surprise you.