SSIF bi-direction miniature ball screw. Nominal diameters on this listing: 5, 6, 8, 10, 12, 14 and 16 mm. The Mininature Ballscrew block diameters are 3, 4, 5, 6, 8, 10, 12 and 16 mm. 14 mm is not a diameter row on that block. Leads listed on the page include 1, 2, 2.5, 3 and 5 mm, which are pitch columns on the miniature grid, plus 4 mm, which is not a miniature pitch column. Precision ball screw manufacturer OEM. Linear motion ball screw for CNC machine. Materials on the sheet: SUS440C / 9Cr18 / GCr15 / 1.4104. MOQ: 1PC FOR CUSTOMIZATION.