BIJIA 1.5-4X30 Hunting Shockproof Rifle Scope with Weaver rail Magnification:1.5X-4X Objective Diameter:30mm Tube:25.4mm High-quality optical glass and fully-coated optics deliver bright, sharp images Field of View (ft. @ 100 yds): 31.4/10.5 Fog proof and shock-resistant housing Quality guaranteed, or refund