molded plastic part 1.different models/diameters/sizes etc 2.high quality 3.advanced equipment 4.use PBT,PC material 1.different models: 2u,3u,4u,spiral shape, insert,etc.2.color: any colors.3. material: use PBT,PC,PP,etc.4.high quality.5,different diameters and sizes. full spiral series for plastic parts of energy saving lamp