1Metallized polypropylene film roller structure improves performance of the product and makes it durable. 2Reliable insulation performance, excellent electrical properties and safe explosion-proof devices. 3Heat resisting, low leakage, low loss and low impedance. 4Current with good impact resistance, strong overload ability. 5Suitable for the start-up of single-phase motors with frequency of 50Hz and 60Hz, such as air conditioners, compressors and motors.