Photo above shows Dispenser with Weighted Steel Base (#T13451, sold separately).

The Dispenser (sold separately) is made of strong ABS plastic with a steel jagged (serrated) blade for cutting and an aluminum roller.  The Dispenser features a spring-loaded cover to hold the tape roll in place.
Dimensions of Dispenser: 206mm x 117mm x 60mm H (8 1/8" x 4 5/8" x 2 3/8"H).

The Weighted Steel Base (#T13451, sold separately) is designed to be used in conjunction with the Dispenser.  To use the Dispenser effectively, the Weighted Steel Base should be attached to the Dispenser. It is highly recommended that the Weighted Steel Base is also purchased when ordering a Dispenser.

Protective Tape (available in 3 sizes and sold separately) is pulled over a White Label (available in 3 sizes and sold separately) for easy adhering to lab items.  Use to adhere to bottles, plates, boxes, containers, cabinets, books, lab equipment, etc.  This protective tape withstands deep freezing, autoclaving, acids, alkalis, aqueous solutions, and organic solvents. Impervious to chemicals and moisture. Will not discolor after autoclaving for 40 minutes at 125°C(258°F) nor one week in liquid nitrogen at -196°C (-384°F).

Together (dispenser - weighted steel base - tape - label), these components of the System create a useful and durable Protective Labeling System.
 
Note, all components are sold separately:
Dispenser, weighted steel base, protective labeling tapes, and white labels.