ITEM NAME:For Sewing Machine Three Pieces Stretch Twin Needles Double Needle Set DIY CHIC.1 Set of Needles (3PCS). Needle No.: 2 / 90,3 / 90 (for decorative lines, thick material decoration), 4/90 (elastic fabric). Spacing: two needle spacing 0.2cm, 0.3cm, 0.4cm. hope you could understand.