Anodized aluminum Presta valve extenders — 30 mm or 40 mm. Sold in pairs with the tool you need to install them. Designed for deep-section rims where a stock valve falls short. Why it works Pair the right valve to the right rim. If you've ever tried to inflate a deep-section wheel with a 40 mm valve, you know. Extenders give you the depth you actually need. For valves with a removable core. Take the core out, screw the extender on, screw the core back in. All Eclipse Presta valves are removable-core; most modern aftermarket Prestas are too. Anodized alloy. Won't gall against the valve thread, won't corrode the way cheap brass does. Tool included. Removing and reinstalling the core takes a Presta valve tool. We put one in the bag. Specs Length options 30 mm or 40 mm Material Anodized aluminum Pack size 2 extenders + 1 valve tool Compatibility Presta valves with removable cores (all Eclipse Presta valves) Best for Deep-section carbon wheels (typically 45 mm and deeper) Race wheels swapped onto a non-race tube setup Anyone who'd rather extend a working tube than buy a new one with a longer valve What makes Eclipse different Eclipse pioneered TPU inner tubes in 2011 — and we build the small stuff that goes with them to the same standard. Every part is selected and tested to work cleanly with TPU and with the patented all-aluminum Eclipse valve.