I have a new Losmandy Celestron dovetail plate for 11", bolts to existing holes on the front and back of the OTA. Wt. 2.25 lbs. Length 17.25". I purchased this to mount my C11 OTA to a Paramount ME but, I ended up purchasing a C14 OTA and selling the C11 so I have no need for this dovetail bar. Brand new they sell for $90.00, I selling mine for $70.00 + shipping.