K&H Pet Products Bird Sand Thermo-Perch Medium Sand 13" x 1.25" x 1.25" Sandy coating keeps bird feet and nails healthy Protect exotic birds from the harmful effects of air conditioning and cold drafts. Thermostatically controlled to an optimum body temperature. Made of sturdy scratch and bite resistant non-toxic plastic. Uses harmless, 12-volt, low voltage electricity to heat the perch.