Explore Scientific Replacement Cradle Ring Set for Comet Hunter Series Telescope. This Explore Scientific Comet Hunter Series Telescope Cradle Ring Set is topped with a slotted carry handle so that it is easy to move your telescope around when it is off the mount. Attach a camera guidescope or other accessory to the top of the handle with standard 1/4-20 bolts. The Explore Scientific Comet Hunter Series Telescope Cradle Hinged Ring System separates easily by loosening the over-sized metal thumbscrews and securely locks back into place. Specifications for Explore Scientific Comet Hunter Series Telescope Cradle Hinged Ring System: Length: 7.75"; 197mm Inside Diameter: 6.9"; 177mm Package Contents: Explore Scientific Replacement Cradle Ring Set for Comet Hunter Series Telescope Explore Scientific Replacement cradle ring set with a slotted carry handle and Vixen style plate for Comet Hunter Series Telescope. Inside Dimensions = 6.9; 177mm