Industrial sewing machine thread #50, set of 10, King Fit etc. New and used. 5101 This is a set of 10 industrial sewing machine threads, #50, including King Fit, with some new and some used. Shipping via Kuroneko Compact. Please check the remaining amount in the images. Will be shipped in a simple package using a recycled box or air-packing material. The seller will select the best shipping method and packing materials each time, so the buyer cannot specify them. The 4-digit number at the end of the product name is a management number assigned for listing purposes and is not related to the product itself.