Steeped in history the new silca impero ultimate frame pump is a culmination of merging high tech modern materials and manufacturing with the full aluminium construction and durability that was a hallmark of the original 1920s impero featuring flexwing technology the silca impero ultimate frame pump will fit tube sizes between 1 25mm and 25 60mm including aero frames with the use of a frame strap the impero ultimate also fits frames with a pump hook as the handle end ha