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 - ColorAssorted Color -Material:PVC - Size: 20.00X8.30X0.20cm/7.86X3.26X0.08in - 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 pets not to bump into them. - 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. - Just peel off the back and apply it to the glass window. No glue is needed. Removable and practical. Package list: 1 x set of anti-collision window cling(6pcs/set)