https://www.amazon.com/LANCOSC-Magnifying-Stepless-Adjustable-Magnifier/dp/B08F55MW5R/ref=mp_s_a_1_4?crid=278COXZ7WMSRC&dchild=1&keywords=craft+lens&qid=1632537102&sprefix=craft+lens&sr=8-4 this is the product I am using :) Works like a charm. I suck the springtails into my entomology aspirator (pooter) and view the cup to make sure I have only the desired species and no mites before dumping into new culture. ~25 springs at a time is not hard to manage