Check the listing for details. 1" Side Diamonds 51 Piece Set - Mylar. Condition: New. Listed at 18.58 USD. Made in the USA! Your browser does not support JavaScript. To view this page, enable JavaScript if it is disabled or upgrade your browser. 50- 14 mil thick Mylar Templates. Each side measures 1 inch. & 1 -1/8" Thick 1 inch Diamond Acrylic Template- Markings are laser engraved for long lasting use.Each Mylar piece is conveniently engraved with it's size for easy identification. Mylar pieces are sized to fit inside the acrylic template.Just cut your material around the Acrylic template and you are ready to sew around the Mylar. Mylar is heat resistant, use a household iron on low. Remove the Mylar with the hole after sewing. Use over and over! This Acrylic does have the 1/4" seam allowance and Guideline Holes. This particular set is side measurement. This acrylic part of the set is 1/8" thick This set matches up with both the 2" Hexagon Set UPC# 635231871619 and the 1" Equilateral Triangle Set UPC# 635231872067 Find both in our store.Mylar is a trademark of DuPont Your browser does not support JavaScript. To view this page, enable JavaScript if it is disabled or upgrade your browser.