plastic covers 1.different models,diameters,sizes etc. 2.high quality 3.Advanced equipment 4.material: use PBT,PP,etc 1.different models: 2u,3u,4u,spiral shape, insert,etc.2.color: any colors.3. material: use PBT,PP,etc.4.high quality.5,different diameters and sizes. PBT plastic covers for lotus shape energy saving lamp