Review on Detachable Plastic Test Tubes for Lab Furniture by BIPEE - Lab & Scientific Products by Bryan Fields

Based on previous reviews, quality may be an issue. I read somewhere that there were sometimes hairline cracks in some of the holes, but luckily I didn't have any. To me, it was like each of the top two shelves was being produced by a different machine and not checked for consistency. One of mine was slightly longer which made it difficult to insert the other. Also, my bottom shelf dangles when assembled. The only saving grace for this, contrary to some other reviews, is that my stand sits flat on a flat surface. I gave 3 stars because it works for me and the price allows me to overlook imperfections. YMMV