The AdirOffice 8.5”x11” Acrylic Window Sign Holder with Suction Cups is the great tool for clearly posting and displaying temporary notices. With the suction cups, this sign holder easily installs on glass or other non-porous surfaces. Its 0.125-inch clear acrylic plastic is durable enough for long service life. It is the best alternative to taped notices that leave behind messy residue. With this, there will be no more annoying banging or swinging like with hanging signage.