This is for the compact 1x30" belt +5" disc sander. The reviews are lumped with the bigger belt sander that's a few dollars more so it can get confusing. I have several dust extractors (Festool/Karcher) + many adaptors/connectors. The ID/OD of the dust ports are 38/45mm and nothing stock fit perfectly. I bought some stepped rubbery adaptors that almost fit perfectly but needed a bit of tape still to pad out the connector into the ID of the sander. The supplied belt/disc is very effective at removing large amounts of material. The belt table was not flat and I will have to bend it (if that's even possible) so pieces don't catch on the sharp back edge of the "slide-through" slot. Overall excellent for the price.