Durable Polycast frame is virtually unbreakable under normal use. Will not mar or scratch fine surfaces or furniture. Durable acrylic vials. Convenient ruled edge. No. 330-24: Length: 24 In., Material: Plastic, Magnetic: No, Number Of Vials: 3, Pkg Qty: 1 No. 330-48: Length: 48 In., Material: Plastic, Magnetic: No, Number Of Vials: 3, Pkg Qty: 1