Poppy Crafts Thermal Binding Covers - A4 4mm Clear 5 Pack. Achieve a professional, polished finish with these clear thermal binding covers. Perfect for creating sleek, durable bound books, reports, or presentations. Ideal for use with Poppy Crafts Thermal Binding Machine (PCTHERMALBINDER) & Poppy Crafts Thermal Binding Adhesive Glue Strips (PCTHERMALGLUESTRIPS), all sold separately. 4mm holds 26-35 sheets.