I have a generic spindle sander from taiwan. Pretty similar to the jet machine (perhaps even made in same factory). Purchased these sleeves and they fit my bench mounted generic unit just fine. Note that these sleeves are available in two lengths, one for smaller bench mounted machines and one for the larger floor standing spindle sanders. Make sure you get the correct sleeves :)
Great Sleeves - Sometimes Hard to Find:
I don't claim to know how sandpaper is made or which materials/processes make one brand better than another. That said, these Jet sleeves have the abrasive perfectly distributed, don't load up, and last a very long time. About 100 board feet later, the first set (different diameters - first sleeve of each) is still going strong. I can't say the same thing about "D" brand, haven't used and can't find 3M brand.
