Descriptions: High quality 4.72" acrylic dome. Great for many uses. Could be used as a pet window in a gate, a kid window in a playground, a cover to protect a surveillance camera (may possibly interfere with motion detection), a cover to protect an all-sky camera, a cover for a skylight (if sealed sufficiently), and anything else you can think of. Note that the shape is half a sphere and that two put together could make a nearly perfect whole sphere. Features: Well Ultraviolet Resistance and Aging Resistance. Transparency: =94%; Distortion factor: =0.16% Material: Acrylic/Polycarbonate. Max Inner Diameter of hemisphere: Approx.120mm/4.72inch; Outer Diameter:Approx.140mm/5.51inch; Height:Approx.75mm/2.95inch. Center distance of locating hole: Approx.93mm(3.66inch) / 130mm(5.12inch); Width of edge:Approx.10-12mm; Diameter of locating hole:Approx.3mm/0.12in; Dome Thickness: 3mm. Package Includes: >1 x 120mm/4.72inch Acrylic Dome

Package Includes: 1 x 120mm/4.72inch Acrylic Dome (please see pictures about size details and read descriptions carefully before you order). Max Inner Diameter of hemisphere: Approx.120mm/4.72inch; Outer Diameter:Approx.140mm/5.51inch; Height:Approx.75mm/2.95inch. Center distance of locating hole:Approx.93mm(3.66inch) / 130mm(5.12inch); Width of edge:Approx.10-12mm; Diameter of locating hole:Approx.3mm/0.12in; Dome Thickness: 3mm. Well ultraviolet resistance and aging resistance. Through ISO14000, SGS and RoHS certification. Well transparency: =94% -Low distortion factor: =0.16%. Great for many uses. Could be used as a pet window in a gate, a kid window in a playground, a cover to protect a surveillance camera, a cover to protect an all-sky camera, a cover for a skylight (if sealed sufficiently), and anything else you can think of. High quality Max Inner Diameter 4.72inch/120mm acrylic material dome, 4 holes with a thickness around 3mm. Very good design with some transparent screw threads feeling.