The Presta Pro Head is a premium, fully CNC-machined pump head designed to pair perfectly with Lezyne HP (high-pressure) and HV (high-volume) pumps. An easy-to-use, slip-on pump head designed for Presta-only applications - the ergonomic, slim, aluminum lever is actuated to securely lock the Presta Pro Head onto the valve for reliable high-airflow inflation. The innovative Valve Bleed System (VBS) engages the valve pin allowing for fine-tuning tire pressure- Simply push the VBS button to release air from the tire to achieve the desired pressure. Engineered using corrosion-resistant brass internals and a robust aluminum body with a gloss silver anodized finish.

• A premium slip fit lever actuated presta only floor pump head
• Fully CNC-machined aluminum construction
• Compatible with Lezyne high-pressure and high-volume pumps
• Valve Bleed System (VBS) allows for smart tire pressure adjustments
• Ergonomic design
• Corrosion-resistant brass internals
• Color: Silver
• Weight: 42g
• Dimensions: 39mm, 19mm, 69mm

Lezyne California Proposition 65 

https://cambriabike.com/pages/warning-california-proposition-65

 WARNING California Prop 65 Warning: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. (California law requires this warning be given to customers in the state of California.)