These Curved Adhesive Mounts by GoPro are made from high quality polycarbonate are are designed to attach easily to any curved surface. Though the GoPro HERO and HD HERO cameras come with these mounts included you'll never know when you'll need another one to attach to something. This package includes five curved 3M adhesive mounts. They are made with 3M's innovative VHB 4991 adhesive backing which makes sure when you put them somewhere that they stay there. They can also be removed cleanly when heat, say from a hairdryer, is applied. They come with a one year manufacturer's warranty.