Fill-In Extensions 40 cm, 100% human hair, 50 extensions per pack.Prebonded extensions for length, volume and color, permanent application, reusable. The extensions last up to four months and do not stress the natural hair in any way. Depending on the natural hair growth, the extensions are reapplied after three months or the bonding becomes visible. The strands are welded on with the connector.100 % real hair Length 40 cm50 extensions per package