To order a laboratory rack, you need to know four things.
1. Diameter of the test tube
2. Number of rows required
3. Type of rack (see below)
4. Number of holes per row
Then simply combine these to make up your order e.g.
White is the standard colour. Specify if you wish to order coloured racks. Racks are fitted with small stud feet but can be made without feet if required.
For ordering simplicity, request a Springlab catalogue. Everything you need to know - what's available, how to order, prices and delivery. Also the indispensable Springlab Tube Measuring Gauge takes the guesswork out of specifying the hole diameter.