... PROFESSION LADDER FACDTORY. WE ARE 6 YEARS OLD SUPPLIER IN ALIBABA.2,MaterialA:: Aluminum material (1) All of our aluminum material ... have verified by BV.and you find those report from alibaba.)C:Quality control. (1) Each telescopic ladder must pass professional ... VERITAS CERTIFICATION)More details please check our show room on Alibaba. You can find many information on Company Profile and PDF ...