Box of 500 g of brass pins No. 4, ideal for thick fabrics, 30 mm - ø 0.85 mm. These brass pins are more flexible than the steel pins. Ideal when working on delicate fabrics as it will warp before the fabric is damaged. These stainless pins combine the flexibility of brass with the durability of a nickel-plated steel pin.Size equivalence:No. 3/0 = 10 mm - ø 0.55 mmNo. 2/0 = 14 mm - ø 0.60 mmNo. 1/2 = 18 mm - ø 0.60 mmNo.1 1/2 = 22 mm - ø 0.65 mmNo. 2 = 24 mm - ø 0.60 mmNo. 2 1/4 = 26 mm - ø 0.65 mmNo. 4 = 30 mm - ø 0.85 mm