Seam share ruler for iron $ 5.19 Size: 1Length about 20cm, width about 10cm, thickness about 0.35mm 2Length about 30cm, width about 10cm, thickness about 0.35mm Material: Special treatment high temperature resistant transparent resin Description: It is mainly used for patchwork, with R angle and seam allowance, etc. It can withstand high temperatures below 220 degrees. The iron can be directly ironed without damage, and the short-term extreme high temperature can withstand 280 degrees. There is also a right angle design, which is used to measure the horizontal and vertical dimensions of the fabric.