12" Record JACKET Sleeve. 12-3/4 x 12-3/4" 3 mil POLYETHYLENE NO flap. Fits over 12" LP Jacket. Will hold double album jacket. Also holds the following 180-gram record jackets: • Single 180g record in jacket. • Single 180g record in gatefold. • Double 180g record in gatefold. Polyethylene is a soft clear material that has s