One of the most feared weapons of the German Wehrmacht was the 88mm Flak/Anti-tank gun.
The Germans' discovery of the potency of their heavy flak (anti-aircraft) guns in an anti-tank role was one of their most startling contributions to the armoured warfare of the Second World War.
The '88' was a weapon both feared and respected by the Allied forces in the Western Desert; no tank could stand up to it; and the '88' came to be regarded as the ultimate German wonder weapon of the desert war, with almost mythical powers.
Rommel eked out his over-stretched resources in eastern Cyrenaica by digging-in '88s' to hold his front-line positions at Sollum and Halfaya; and these guns reaped a rich harvest when Churchill's precious 'Tiger Cubs' were rushed from the training-grounds of Britain to the desert battlefield.
o Caliber: 88 mm.
o Overall length: 25 feet
o Rate of fire: 15-20 rounds per min.
o Crew numbers: 6.
o Max effective altitude 14,680 meters.
o Max effective horizontal range: 10,600 meters
This info comes from http://www.diggerhistory.info/pages-weapons/flak88.htm