The Protek Max tubes feature a proprietary shape and construction that is extremely resistant to punctures. Features: Contains liquid sealant that immediately closes small punctures to prevent air loss Excellent air pressure reteintion Square shape retains shape better and resists twistin during installation Excellent air pressure retention Specs: Labeled Size700 x 35-47 Valve CoreRemovable Shaft TypeSmooth Tube CompoundButyl ISO Diameter622 / Road / 29" ValveStandard Schrader Flat ProtectionSealant
