Features: 1. With insulator on surface, safe to use, high reliability. 2. Heat up quickly, long service life. With mounting holes, easy to install. 3. Adopts heat-resistant silicone wire as leading wire, red wire for "+" and black wire for "-". 4. This system is energy saving, when the heater increases the environmental temperature, the power will reduce gradually within certain ranges. 5. Applicable for heater, humidifier, air conditioning and other commonly used appliances. Specifications: Condition: 100% Brand New Color: Black Optional Type: #1 Rated Voltage: 12V Rated Power: 150W (15A) #2 Rated Voltage: 24V Rated Power: 150W (10A) #3 Rated Voltage: 24V Rated Power: 250W (15A) Mounting Hole Distance: approx. 87mm / 3.4" Mounting Hole Diameter: approx. 4mm / 0.16" Product Size: approx. 60 x 60 x 42mm / 2.4" x 2.4" x 1.7" Environment Temperature Range: -5~65℃ Package Weight: approx. 160g Quantity: 1pc Package Included: 1 x PTC Heater