Made of strong, hard acrylic, not easy to bend, deform or break, and the light color makes it easy to see the holes and the fabric underneath. The needle is easy to enter, the scale line is more obvious, and the accuracy of sewing work is improved. 3-in-1 Quilting Guide: The seam gauge has a 45-degree line for trimming half-square triangles. It's a 2.5 inch x 5.5 inch sewing ruler that can also measure small pieces. the sewing guide under the presser foot to position the needle into the desired seam hole for an accurate . It is a great helper for quilting to get the correct size. No guessing. Wide range of application: can sew and make all kinds of sewing projects, such as dresses, hats, shirts, skirts, pants, handbags, curtains, etc. Contains: 2pcs sewing guides, the combination is very suitable for use and replacement in , to meet your various sewing needs. Material:acrylic colour:transparent + green Package Contents: 2 * Sew seam allowance rulers Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.