Manufactured with premium PVC material for supporting a long term use. Not only anti-collision window clings, but also beautiful window decorations. Easy to tear and paste, this sticker is practical and convenient to use. You can easily stick them on glass windows. Features -Color:Assorted Color -Material:PVC -Size:12.30X20.00X0.20cm/4.83X7.86X0.08in - These stickers can help birds identify the glass and reduce bird collisions. Protect birds effectively. - You can also put them on glass doors to remind people, and your pets not to bump into them. - Suitable for glass panels, patio doors or Windows to help from attacking glass - Simply place these window clings onto the window's inside surface for finishing the work, do not need adhesive, give you . - They can be used inside and outside your Windows. Meet your different needs, very convenient to use. Package list: 1 x set of anti-collision window cling(6pcs/set)