Check the listing for details. ORGAN sewing machine Serger Needle DCx1F for Babylock Simplicity FLAT SHANK. Condition: New. Listed at 1.99 USD. Organ Flat shank DCx1F Babylock/Simplicity Serger Needles FLAT SHANK DCx1F Overlock / Serger needle Fits: Babylock : BL202, BL302, BL400, BL402, BL, 430, BL432, BL4-415, BL4-428, BL4-428D, BL4-436, BL4-436D, BL4-714, BL4-728D, BL4-736D, BL4-738D, BL4-838D, BL5040, BL5040L, BL5180, BL5260D, BL5280ED, BL5370ED, BL5380ED, BLSE200, ST600L Simplicity : SL850, SL880 needle size & thread chart: Thread Needle Fabric Weight V-30 #12 or #14 fabrics under 1 1/2 ounces V-46 #14 or #16 Fabrics under 3 ounces V-69 #16 or #18 Fabrics up to 6 ounces (can use for Sunbrella) V-92 #18 or #20 Fabrics up to 10 ounces (can use for Sunbrella) V-138 #20 or #22 Fabrics over 10 ounces. This thread is too heavy for practical use in home sewing machines. or larger