3Pcs/Set 3 Size Multifunctional Durable Double Double Needles for Home Sewing Machine Pins Sewing Crafts Accessories Mix Size 2/3/4mm with BoxFeature:1. Two identical seams can be sewn at once, two parallel straight seams are the most commonly used.2. The double needle support sewing machine can also be used on other stitches. The top 2 threads in different colors can be used. Specification: Product Specification: 2/3/4mm box Package Weight: 4.74gProduct Size: 5X2.5X1cm/1.97X0.98X0.39" Instructions: Double straight stitches from double stitches are decorative stitches, which are similar but different from the stretch stitches of a sewing machine. When sewing with a double needle, adjust the left and right needle positions (straight stitches) or reduce the width of the seams (master stitches) to prevent the needle from hitting the presser foot or stitch plate and breaking. Note:1. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-3mm measurement deviation due to manual measurement. 1X2mm Needle1X3mm Needle1X4mm Needle