plastic component 1.different models/diameters/sizes etc 2.high quality 3.advanced equipment 4.use PBT,PC material plastic component,cfl,compact fluorescent lamp, 1.different models: 2U, 3U, 4U spiral shape, insert etc. 2.color: any colors. 3.material: use PBT, PC, etc.4.high quality, advanced equipment 5.different diameters/sizes etc