Available in four different colours – red, blue, green and yellow – for easy identification, Cleaver Scientific tube racks are ideal for scientists performing techniques requiring multiple 0.5, 1.5 and 2 ml tubes. All tube racks are made from either standard 3mm acrylic for ordinary use or autoclavable PVC that is suitable for work in containment areas, such as tissue culture rooms, where sterilisation of equipment is necessary after use.