Provides even heat across the surface of a beaker and eliminates the risk of damage to the heater due to chemical and moisture spillover. These heaters include a hook-and-loop fastening device that provides quick installation and allows the heater to be reused. Made of fine-strand resistance wires that are double insulated with braided fiberglass and knitted into flat tapes. Tapes are then completely enclosed in high-strength, high-temperature-resistant silicone rubber. Warning: heating tapes require the use of a temperature or power controller sold separately. Not CSA approved what's included: 2-ft (0.6-M) power cord with standard 2-prong plug convent hook-and-loop fastening device allows for quick installation and removal of the heater accommodates most standard-sized beakers.