With insulator on the surface, safe to use, high reliability.Fast heating, long service life. With mounting holes, easy to install.Adopts high temperature wire as a leading wire, durable.This system allows automatic control of the heat output in certain areas.Applicable to heating, humidifier, conditioning and other commonly used devicesCondition: Rated voltage: 12 V.Rated : 100 W.Mounting hole distance: approx. 87 mm / 3.4 inches.Mounting hole size: approx. 4 mm / 0.2 inches.Colour:blackMaterial:Silicone+PTC+metalSize:about 6 x 6 x 4.2 cm / 2.4 x 2.4 x 1.7 inchesweight: about 120 gPackage Contents:1 x PTC heaterOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.