Good sealing performance, no leakage Good pressure and corrosion resistance High and low pressure type, suitable for most bicycles As service parts for Presta valve with removable core Choice material & accurately CNC-machined Grid-textured head casing for stable performance Comes with tool for easy service operation Use: for Presta valve with removable core Net weight: Approx. 1.54 grams /Piece colour:Silver Material:copper size:26 x 4.6MM Package Contents: 12 x valve core 1 x tool Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.