8-20Set Bicycle Presta to Schrader Valve Adapters+ Bike Presta Valve Extension Aluminum Alloy for Cycling Repair Accessories 3pcs/set Aluminum Alloy Bike Bicycle Presta to Schrader Valve Adapters+ Presta Valve Extension Features: - Good material, durable and easy to install; - No leakage due to environmental protection seal ring; - Comes with a Presta to Schrader valve adapter, Schrader to Presta valve adapter, and a Presta valve extension; Specifications: Material: metal Packing size: 110 x 105 x 10mm/4.33 x 4.13 x 0.39" Gross weight: 14g 1 x Presta to Schrader Valve Adapter 1 x Schrader to Presta Valve Adapter 1 x Presta Valve Extension