【Highlight Features】 1. With insulator on surface, it is safe to use with high reliability. 2. Heat up quickly, long service life. With mounting holes, it is easy to install. 3. Top quality heat-resistant silicone wires are used as heater's leading wire, heat-resistance is higher than 392.0.4. Red wire for "+" and black wire for "-". 5. Energy saving system, when the heater increases the environmental temperature, the power will reduce gradually within certain ranges. 6. Applicable for heater, humidifier, air conditioning and other commonly used appliances.Instructions1. When the ambient temperature is 75.2, the outlet air temperature of the heater:3/8" distance from the heater surface: >140.02" distance from the heater surface: >122.04" distance from the surface of the heater: > 104.0 Specifications:Condition: 100% Brand New Color: Black Type: 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:23.0~149.0Package Weight: approx. 160gQuantity: 1pcPackage Included: 1 x PTC Heater