Colour your world with a wide variety of economical storage boxes for your snap or screw cap 5.0 ml tubes.These storage boxes are designed to be used at temperatures between -90 °C and +80 °C.A transparent cover allows the user to see the contents of the box, and is keyed to the base to prevent misalignment. Printed with a series of squares numbered from 1 to 25, the surface accepts writing with markers, facilitating inventory control. A unique color coding system uses colored plastic grids to separate the cover from the base. Cover made of polystyrene / Base made of high impact polystyrene. Supplied in packs 18