I have a pair of Armstrong air jacker shocks that can be used to put air ride on beetles, the specs are:
BEFORE INFLATION, OVERALL LENGTH IS 405mm, LENGTH FROM BOTTOM OF THREAD TO CENTRE OF EYEHOLE IS 350mm. EYEHOLE SIZE IS 13mm.
WHEN INFLATED OFF THE CAR THEY INCREASE BY APPROX. 180mm. OBVIOUSLY THE ACTUAL EXTENDED LENGTH WHEN FITTED WILL DEPEND ON AIR PRESSURE, MOUNTING POINTS AND LOAD.
MAXIMUM PRESSURE RATING IS 140 psi. THEY ARE NEW AND UNUSED. THEY ARE UNBOXED, HENCE SOME SLIGHT CHIPPING AND SCRATCHES TO PAINTWORK, BUT APART FROM THAT THEY ARE UNDAMAGED.
£100ono posted, cheaper if collected from bishops stortford