Silca Presta Chuck 17-4 Stainless Steel
- Iconic Silca Presta Head Design - in use by more pro team and shop mechanics than any other!
- 17-4 Stainless Material, 6X the strength and 2X the hardness of Brass
- Full Synthetic Elastomer 242 Gasket
- 5X the durability of traditional rubber materials
- New Two-Stage gasket sealing geometry optimized for all Presta valve stems
- Pressure amplifying dome geometry uses air pressure to clamp valve stem
- Schrader valve thread on hose side threads into any Schrader compatible hose attachment