This product is made of 304 stainless steel.It is used to put tubes which are diameter of 15mm .There are 40 wells,so it is suitable for 40 tubes.From the picture, you can see there are three tiers,it has good stability.It will not shake when you move the rack.Besides,we have other kinds of stainless steel tube racks.As the following form shows. High quality & favorable price. Best for Hospital and Clinic.

We offer Stainless Steel Test Tube Rack in different size.If you have the drawing, we could follow it and produce for your special requirement..Just contact me freely