Scope of application: Suitable for 12 "vinyl records, size perfect fit. Acid-free construction ensures that there is no risk of vinyl aging or label discoloration, safely preserving your most precious vinyl records over time. 12" round protective inner Sleeves thicker than standard record Sleeves to protect your vinyl records. Avoid dust, dirt, scratches affect the sound quality, prolong the use time of vinyl records. Material: safe and tasteless LLDPE(low density polyethylene) is used to prevent the vinyl record from getting dust, which will affect the sound quality, prevent the vinyl record from carrying static electricity. Protective Sleeves Size :12.12*12.04inch, thick 0.08mm 3mil. Package: 100pcs 12 "LP with circular protective inner Sleeves.