This is a pair of excellent reproduction air cleaners, correct for Jaguar XK120 OTS and all XK140's, or other car with 1-3/4 inch SU carburetors. The opening is actually 1 5/8" and the bolt spacing is 2 7/8".
They are very nicely made, and come with new bolts and correct decals advising that one wash them in petrol every 5000 miles. Quite.