Item description according to supplier: The nickel-plated steel is perfectly polished which gives them an incomparable glide. Thanks to their flawless tip, these pins will go through your light and medium fabrics without leaving any trace and without damaging the fabric. (13, 900 pins/kg).Size equivalence:No. 3 = 26 mm - ø 0.65 mmNo. 4 = 30 mm - ø 0.60 mmNo. 6 = 34 mm - ø 0.60 mmArticle number Supplier: 43016
