Card of 10 needles. 10 Sewing Machine Needles - Organ16 X 257, DB X 1, 16 X 231 For Industrial Sewing Machines such as Juki or Singer commercial machines Will fit machines like Juki DDL-555, Juki DDL-5550, etc. Sizes Available. Sewing Machine Needles , Organ 16 X 257, Db 1, 231 - For Industrial Machines Such As Juki Or Singer Commercial