Silca Impero Ultimate Frame Pump: 50-53cm Frame, Black, LG FlexWing Technology Fits Tube size between 1" (25mm) and 2.5" (60mm) Silicone Bumpers for secure fit and Ultimate Paint protection Most efficient Inflation of any Portable Pump (112 strokes = 100psi size Small) 2 Stage Sealing Advanced Elastomer Head - No fussy lever to mess with. 100% Full metal construction - No plastic parts to break, bend, slip or rattle and covered by SILCAShield