Made of High Impact PS. The back plate of the 72 place support is made from a single mold of 4 mm rigid HIPS. The peg sockets have closed ends eliminating leakage and consequent bio hazards. The seamless drip channel collects waste which drains via drain tube provided. 72 push in pegs which can accommodate items with “neck” bore in excess of 15 mm are supplied and 11 small pegs of diameter 6 mm for small diameter items such as test tubes. They are easily removable for cleaning or to accommodate particularly shaped items. This rack will not stain or rust. Comes complete with mounting kit, draining hose, and fixing template. Additional racks can be joined together to make a bank of racks, using the joining plugs provided. Supplied with draining kit (connector + tubes). Discharging tube: internal 11 mm, external 13 mm.