Corner covers for glass aquariums 8 pieces total, for 2 aquariums, 5mm thick. Taken out of the bag for photography. For aquarium cleaning, moving, and to protect against accidental collisions by children. I also use them on the corners of my bathroom shampoo stand, which are sharp. *Please refrain from purchasing if you are concerned, as these items have been stored at home. *Shipping will be via Yu-Packet Post or Mini, which includes a tracking number and compensation. Packaging will be in a food container and then placed in an envelope. *Shipping may be delayed to the next day due to having a small child.