HOUYEE 120 Pack Binding Covers and Backs Set with 100 Pack Plastic Spiral Binding Coils,6mm (1/4"),30 Sheets Capacity,4:1 Pitch, 48 Loops, for Letter Size

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【Binding Covers and Backs Set】: The HOUYEE binding covers set includes 60pcs 10Mil clear binding covers and 60 pcs 12Mil black sand-texture polycovers, 120 packs in total, This binding covers set meets everyday binding needs for school, home, and office use. 【Letter Size】: These clear front and black back covers are made from high-quality materials, 8.5" x 11" (standard Letter size). They protect your projects from bending and creasing, ensuring documents remain secure and are presented with clarity. 【1/4 Inch, 30-Sheet Capacity】: HOUYEE plastic spiral binding coils, with a diameter of 6mm (1/4 inch), securely hold up to 30 sheets of paper. The pack of 100 makes it easy to bind documents and preserve them for long-term use. 【4:1 Pitch, 48 Loops】: The spiral binding coils have a 4:1 pitch, making them compatible with any binding machine that punches 4 holes per inch. (Note: These 4:1 pitch binding coils are not compatible with cinch machines, comb-binding machines, or wire-binding machines. They are for spiral coil binding machines only.) 【Ideal Binding Combo】 Plastic binding covers + spiral coils: perfect for reports, presentations, and organizing documents. Ideal for schools, offices, home—great for teachers, pros, students. Also a practical gift.