Aquarium test tube dryer .5 inch (12mm)

REV 3 is complete, the fit is very tight but has a satisfying click and will remain rigid. CA as needed if you want this to be even more sturdy

this is a 10 test tube dryer for the sink side, holds tubes after testing for drying, has a handle for easy transport. modeled for API test tubes for aquarium water testing. contact me if you want custom ones made for bigger tubes