Redundant used lens cap From my Pulsar Helion XQ38F. I believe (Scott County) that it also fits Pulsar Quantum HD, XD, XQ38, Helion XQ38F and Helion XP38 thermal monoculars. A couple of nicks in the outer edge but full protection still provided and the cap is a nice stiff fit and reassuringly tight to fold back. £20 up on eBay and £15.99 plus postage from Scott County - yours for £12 posted by RM.