I don't have the ones Al suggested but here are the ones I use:

1/2" https://www.amazon.com/gp/product/B00DE8JGOQ/

1/4" https://www.amazon.com/gp/product/B008B0T5Z2/

1/8" https://www.amazon.com/gp/product/B008B0TJAI/

I also use a common wire mesh kitchen sieve with 1/16" openings to screen dust and fines from Turface/Floor Dry.

Is this what you are looking for?
{{gwi:3443}}

Many threads with photos of these, here is couple of them

click here

...or here

Hello Andy and Rina. Thank you both for your help. Rina - these are exactly the ones I was looking for.

Andy - are the screens inserted into the frames for the ones that you show or are the screens made so that they are a permanent part of the sieve? Also, approximately how long would it take you to screen a 50 lb bag of turface using the sieves? The descriptions list the outer diameter at the top of the screens as ~ 13 inches - what is the diameter at the bottom? I understand from the descriptions the bottom diameter is made such that the sieve perfectly fits over a 5 gallon bucket to catch the material that falls through,

Thanks,

Brian

These are too big to screen Turface. I use a regular kitchen sieve for that because it has 1/16" openings. If you screen with a 1/8" sieve you'll lose too much. I believe Al screens his Turface with insect screen, which is also in the 1/16-1/20" range. I only screen a little at a time so I have no idea how long it would take to do a whole bag. Not sure about the bottom diameter but I'll measure it when I get home.

Thanks Andy