Slica\'s impero ultimate, the merging of high-tech modern materials and manufacturing with the full aluminium construction and durability that was a hallmark of the original impero.Impero ultimate represents the ultimate in design, functionality, security and longevity.Key Features: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,Weights: SM: 256gm M: 267gm L: 278gm XL: 289gm.