Zipp Knurled Valve Extender 27mm for 303 Wheels with Removable Presta Valves (3 Pack)

A three-pack of 27mm Zipp knurled valve extenders for 303 wheels, made for Presta valves with removable cores. Zipp sizes its extenders to rim depth, and this removable-core type suits most tubes and tubular tyres with removable valve cores: the Presta core comes out, the extender threads into the valve body, and the core goes back in at the top. Fitting takes 5mm open-end and 4mm closed-end wrenches.