InsulWeb
You'll also need some kind of hose to attach to the hose that comes with the blower you rent. It should be smaller in diameter than that hose. You just snake it down or up through the hole in the insulweb and gradually bring it back toward you filling in the volume that the hose itself took up with cellulose. Just using a nozzle pointed through the hole won't work if you are trying to pack it densely. So you'll need a reducer to connect the smaller hose to the larger. JR sells all those things.
I just used a 2" inner diameter shop vac hose attached with 2 hose clamps to a 2" to 2.5" reducer. It worked fine. It also helps if you have a wide crown pneumatic stapler instead of a narrow crown stapler. The insulweb tends to blow through the narrow crown staples because there just isn't as much material held beneath the staple crown. It just a convenience more than a neccesity, especially with the cyclone that I used, because it is lower power than some of the other blowers.