10pcs Silver Bicycle Valve Core Stem Presta Style Tyre Valve Core For Tubeless Road Bike MTB Bike Fren for Bicycle MTB/Road Bike 10pcs Silver Bicycle Valve Core Stem Presta Style Tyre Valve Core For Tubeless Road Bike MTB Bike Fren for Bicycle MTB/Road Bike. Sale price : $1.66 Category : Sports & Entertainment