Sleeves Seal Only Once - So You Can Tell if Your Record has Been Tampered With. Perfect for Record Stores, or Those Special 7" Records You Don't Want Anybody Touching! Archival Quality, Acid-Free, Anti-Static Crystal Clear Biaxially-Oriented Polypropylene - Perfect Protection For Your Collection! 7-7/16" x 7-1/4" + 1-1/2" flap - The Perfect Size! Biaxially Oriented Polypropylene (BOPP) means a much better sleeve clarity than the traditional cast polypropylene or polyethylene. This listing is for 100 individual sleeves.