The is made of metal and rubber material, sturdy and practical, which can be used for a long time. Easy on focus even for kids. It is a as a your children and friends, they will like this practical 8x21 binoculars. Features -Color:Black -Material:Rubber, metal -Size: 10.20X9.10X4.00cm/4.01X3.58X1.57in -Instrument magnification: 8 times -Exit pupil distance: 12mm -Exit pupil diameter: 6mm -Field of View: 1000 -Resolution: 7 -This is made of rubber on the outside and metal structure on the inside, with strong durability. -This compact for outdoor is small and compact, easy to hold in the palm of your hand. -High-definition vision compact and professional is suitable for bird watching, concerts and sports. -Sturdy and compact, convenient to carry and store without occupying much space, allowing you to take them where you want to use. -This portable binoculars has high transmittance and clear imaging, 8-fold magnification, reliable and practical. Package list: 1 x