Steel, Single Jack, Double Jack, Galvansised, 30cm, Follower Pot Jack Chains San Yi Chains & Hardware Co., Ltd. Base Info Model NO.:SY-18HS Code:73168900 Description Pre:Steel, Nacm, DIN, Thicness 2.0mm-3.0mm, Brass, Nickel, Anti. Cooper, Black, Decorative, Weldless Cathedral Chain Next:Belleville Spring, Disc Spring, Washer, Dish Spring