This unique stand holds a maximum of 94 pipettes and rotates on a central vertical axis for convenient selection of the pipette you want. The lower rotating disc consists of four concentric troughs with tapered sides and open bottoms that protect tips and allow water run off. The upper rotating disc has a grid pattern concentric with the bottom keeping the pipettes vertical. Draining liquid is retained on top of the stationary base by an outer rim. A low center of gravity stabilizes the 48cm high (18-3/4") stand. Rotating disks are 18cm (7-1/8") diameter. Made of polypropylene and PVC, it comes unassembled with instructions for quick assembly on the 230mm (9") diameter base.