Injection-molded of high-impact light blue polystyrene with 72 holes to fit pegs. Pegs hold cylinders, flasks, etc. and snap in or out easily when desired. Optional interchangeable pegs for test tubes make this rack the most versatile made. Supplied complete with 72 large pegs, expansion hanging hooks, draining tubes, and fastening stoppers which allow coupling with additional racks. Measures approximately 17"" x 24"", pegs are 4"" long. Ledge 3"" O.D.