Scope with the fully coated optical glass would give you a high-contrast and bright image. Made of high-strength aluminum alloy construction, greater strength and durability. Scope can be used under any weather condition， fog, shock, waterproof。 The scope is 7.48" (190mm), a compact scope suitable for quick moving and aiming. Five Lines Boat Crosshairs。 Magnification4x； objective diameter 1.26" (32mm); eye relief 3.3" (83.82mm).