TCS Max-Flow Tubeless Valves allow the valve to be tightened properly without the use of tools. TCS Max-Flow tubeless valves have a multi-directional airflow base on the sides, preventing the restriction of airflow that can occur when the tire liner is pressed against the opening of a traditional valve. The increased hole diameter helps against clogging. Product Name:Valve Length:Material:Weight:Part Number:TCS Max-Flow Black Presta Valve 44mm 2pcs. 44mm Aluminium Alloy 11g a pair W095-0112