... Decent packaging4).Color: Color pure, no have discoloration and aging5).Smell: no scent,environmental.6).Use: For ... : After using,wiring easily and trimly,installing reliably,and is convenient for maintaining and searching and exchanging8).Lifetime: Anti-aging ... safe system8).Installation: easy to open and close ,convenient push-pull,installed with solvent cementing and threading joinin9).Save cost: ...