All 78 rpm Record Kits include: • Clear acrylic front sheet: conservation grade; 3/32" thick; blocks 98% of UV rays. • Bevel-cut window mat (specify color) • Centering mat (supports and positions record) • Protective white back mat Note: All mats are white-backed w/cream core. Aluminum frame kits also include: 4 aluminum frame pieces • 4 backing corners with 8 screws • Hanger Click on drop-down to choose matboard color. Mix 'n' Match frame and mat colors of the same product code for quantity discounted pricing.