cfl plastic capplastic parts 1.different models,diameters,sizes etc. 2.high quality 3.Advanced equipment 4.material: use PBT 1.different models: 2u,3u,4u,spiral shape, insert,etc.2.color: any colors.3. material: use PBT,PC,PP,etc.4.high quality and advanced equipment5,different diameters and sizes. high quality cfl plastic cap for 4U shape energy saving lamp