... be made with a variety of types with Flat head or Umbrella Head, Diamond Point, Smooth Shank and Twisted Shank. ... of the same diameter. Available Sizes SpecificationTwisted or Plain Cap Diameter9# x 2-1/2,2, ... 18mm13# x 1-3/4,2,1-1/2Twisted or Plain 15mmMost Popular is BWG9*2.5"Finish : ... 7Lbs x 16Box/Case, Etc.25kgs/CTN in bulk, or inner box, Woodcase ,ectOur History :Our Factory is ...