1Simple design, light and compact, easy to install and use, convenient and practical. 2Soft rubber goggles protect the eyes when used and provide better eye protection and comfort. 3Made of high quality metal material, with strong toughness, sturdy, durable and long service life. 4Multilayer coating and 50 field of view, ideal for moon, planets and a large number of deep space objects. 5For installation on a 3.175cm/1.25in device, the 40mm eyepiece provides the widest field of view as well as additional clarity and long eye distance. Item Type: Telescope Eyepiece Color: Black Focal Length: Approx. 40mm/1.6in Field of View: 50 Weight: Approx.175g/6.2oz Material: All Metal + Optical Glass Coating: Multi-layer Coating on the Entire Surface 1 x Lens 2 x Lens Protective Cover 1: Do not tear the soft rubber vigorously to cause damage to the soft rubber.2: Keep away from fire to avoid damage to the lens mirror.