• High quality metal construction.
• The UNC (Unified National Coarse Thread) is 1/4"
• The tripod mount ring mount on the tripod, it helps you fix and balance your tele lens which is heavy or long lens hanging off the front of camera.
• Specifications:
• The UNC (Unified National Coarse Thread) is 1/4"
• Ring diameter: 80mm 
• Ring thickness: 4.5mm

1 x Lens Tripod Mount Ring For Nikon AFS 80-200mm f/2.8 D Lens