Test Tube Rack

I do a lot of work in a wet lab and I wanted a way to be able to hold various test tubes. I designed a rack that can hold 4 different size test tubes. I not only use this to hold the tubes with my samples but also utilize this as a drying rack! Key FeaturesCan hold 4 different types of test tubesRaised lip making it easy to remove test tubesStabilizers to make sure the rack stays leveledNo supports required to printSmall and large sizes availableLet me know down in the comments if you'd like a version with custom sized holes!