Features:25ML Tube Rack Test Tube Holder 12 Wells for 16-20mm Tubes.Made of wood, sturdy construction, strong impact-resistance.Economical rack for applications in lab or at home.Specifications:Material: WoodModel: 12 WellHole Diameter: 22mmFit for: 16-20mm tubesSize: 390mm x 63mm x 130mm / 15.35" x 2.48" x 5.12"(L*W*H)Package Contents:1 x Tube Rack