Walther Steel Air Cylinder With Integral Manometer. The one shown here is a traditional-type air cylinder copied for its stability to withstand the unpredictability of an airgun's shooting characteristics. The difference between an ideal Cylinder and this one which has an integral manometer is that the ideal manometer is incorporated into the cylinder itself. There is no need for an extra attachment manometer etc. each of these can be purchased separately. Manometer included. For those who prefer an authentic antique brass look the classic brass manometer can be found here. Specifications for Walther Steel Air Cylinder With Integral Manometer: Manufacturer: Walther Fabric/Material: Steel Package Contents: Walther Steel Air Cylinder With Integral Manometer