☑Our 12 inch plastic vinly outer record sleeves are made with archival virgin grade acid free polythene that has no inhibitors or softeners added ensuring no sticking to outer album cover. Polyethylene sleeves are better at controlling static and are also inert. ☑Ethically sourced and fully recyclable lp polythene plastic outer sleeves. ☑Archival Quality and safe for long term storage. ☑Sleeves will hold single album records and most triple & double gatefold records. Protects against scuffs, dirt, moisture and scratches. ☑Size 325mm to opening x 328mm Approx ( 12 13/16” x 12 15/16” ) Provides for a good fit, not too baggy or too snug.112 micron 4.5 mil, Manufacturer: Gazzsrecords