Keratin bond beads 1000pc pack the clear one is extra strength ( italian keratin) Keratin bond beads 1000pc pack the clear one is extra strength 4-12 week hold For making new strands or re-bonding old strands depending on the old hair's tip condition, you may want to cut off the old tip if they totally worn out. Hard bond Can be used directly on scalp hair The clear one is the extra hard bond, do not try to remove it just after fitting, this is gonna be very hard to do remove with tape in remover or acctone