Eisco Labs Test Tube Stand, Z Shape, Aluminum (1", 0.75", 0.5")

Test Tube Stand Z Shape Aluminum Sheet Fits 18 Tubes 1 0.75 0.5 Inch Sizes

Test Tube Rack 18-Hole Holder w/ Drainage – Fits Tubes up to 11mm – USA

8 Hole 3 Layers Test Tube Holder for 26-30mm Tube Lab Stand Rack Stainless Steel

5 Pcs 4 Way Plastic Tube Rack Colorful Lab Tube Racks Tube Holder for Tubes Lab

5 Pcs Test Tube Holder Lab Stand Rack 4 Way Plastic Lab Tube Racks Colorful US

Various Holes Count Stainless Steel Test Tube Z-Rack Holder Storage Lab Stand

3 Pack Plastic Test Tube Rack, 50 Holes Lab Rack Holder for 18mm Tubes, Detac