Made of cardboard and the end clogs. Made my own using a couple of vacuum cleaner tubes. Taped them to a large coffee can to hold the powder and dropped a teaspoon of the powder into the tube every 4 feet. This works a lot better and no bending over to put the powder onto the ground.
Eighteen bucks for a cardboard tube? The plastic salt-shaker-like dispenser at the end of the tube clogged repeatedly; I had to drill a hole in it to get it to dispense according to the instructions. And after tapping the tube on the ground to get it to work, it cracked and I had to tape it up. Much of the problem is with the product itself -- if you don't use this dispenser, you have to use a tablespoon to apply it to your lawn. Pain in the neck.