12.5mm x 4.57 Meters 1/2" x 15ft) Acid Free As the name says, this tape really is a wonder, it's so strong that it's perfect for almost anything. It's double sided, clear mylar tape which is heat resistant, it will not lift or curl and is perfect for holding small embellishments permanently. RANGER-Inkssentials Wonder Tape. This double-sided; heat resistant clear tape is acid free and archival safe making it perfect for all types of crafts: scrapbooking; card making; paper crafts; general crafts and even fabric crafts (not for garments or items that will be laundered). This package contains 15ft of 1/2in Wonder Tape.