Product content: 12'' Vinyl Record Inner Paper SleevesSize : 12 inch * 12 inch  (305mm * 304mm) Center Hole : 4 inch (100mm)Material: Using safe and tasteless white kraft paper, to prevent vinyl records from dust, dirt affect the sound quality, prevent vinyl records with static electricity, so that it can play quietly for a long time, no crackling and cracking sound.Avoid dust, dirt, scratches affect the sound quality, prolong the use time of vinyl records.Acid free construction ensures no risk of vinyl deterioration or label discoloration over time, safely preserving your most prized vinyl records.Scope of application: Kraft Paper Inner Sleeves is suitable for 12 "vinyl records with perfect fit. There is no excess paper at the top of the inner sleeve after the record is inserted. Made of 100 Gram White Kraft Paper,  not ordinary paper . White Kraft Paper is vey thick and adequate quality .  NOTE : Two bottom corners are all pasted by hand. Weight : 347g (0.77 LB) Size :  12 inch * 12 inch  (305mm * 304mm) Center Hole : 4 inch (100mm) Count : 20 Pieces