You are bidding on set of Collimation Knobs for Celestron 14" Edge HD with SAE thread in new, unissued condition.  Threads appear to be 6-32, but I'm not absolutely sure. This does NOT fit the newest style with the fine metric thread Philips collimation screws.   Will gladly combine shipping for multiple lots if you place items in your cart and request total.  Thanks a million for looking and check out my other items!