I got this separator for my Jet DC-1100.  First let me say that it doesn't look exactly like the picture.  The holes look more like Lee Valley's 'Veritas' lid.  The intake into the dust collector is dead center while the intake into the can is on a drastic angle to form a "cyclone" effect.  Mine was $41 from Amazon with free shipping...I see it's $28 from some other vendors now.  I think it's really worth about $28 in materials.  It's worth more than $41 in value.  I looked at the other lids that are basically a 90 deg. PVC elbow imbedded in the lid.  This one is a lot more aerodynamic.  It is a large lid.  The largest diameter can it fits is about 23.5-24.5", while there is a second internal ring that fits cans around 21.25-22.25".  Even the 30 gallon galvanized steel trash cans I found are closer to 20.5".  I did find that Rubermaid Brute 44 galon trash cans are a perfect size (although I haven't tested their implosion resistance so I can't say anything about that).  And with horse country all around me, my local Tractor Supply has very thick (nearly 1/2") plastic feed barrels that are 24" diameter, tall and very durable.  About $20-25 will get you a nice can.  That's what I chose.  I figured it'd be quieter than steel anyway.  Back to the lid...it's got a foam gasket that has qualities of memory foam (slow to bounce back but shape conforming).  I have high quality ( a.k.a. expensive) 4" clear flexible tubing and it does "screw" into the holes.  It could be a little more snug in my opinion.  I will probably rig something to make the fit a little more air tight.  All-in-all I would still buy this again...or the Veritas because there's not much else out there without dropin some $$$ on a real cyclone.  If you have a dust collector and can't fit or afford a cyclone this is a relatively cheap upgrade.