Dual-Size Design：12.5×12.5 frame displays Double 7 in LPs with mats or 12 in no mats. Deep Vinyl Display: Widen and deepen the border design so that it can be easily fitted and displayed, whether a single album or a double record. Acid-Free Mats: These come with 2 double-sided (black and white) acid-free mats to preserve your sleeves’ quality and prevent yellowing for decades (flip for instant style swaps). Quality Construction: Each frame is made of PVC and the front is a high-clarity acrylic cover. Lightweight but well made, shatterproof but clear (protective film must be removed before use). Easy to Use: Swivel lock clips secure LPs in seconds, with no slipping or damage.