Are non-inductively wound with metallized polyester film as　dielectric/electrode with copper-clad steel leads and encapsulated in a plastec case sealed with epoxy resin .
　 Little volume and weigh ,extensive capacity range ,great specific volume
　 Long life due to self-healing effect
　 Suitable to direct current and direct current blocking ,b**, and filtering of VHF signal
　 Especially applicable to color TV,programmable exchanger and military complete machines