Pre-bonded U/ Nail Tip Human Hair Extensions WholesaleU-tip hair extensions are hair extensions that are pre-tipped with keratin and are applied to the client by use of a hot hair extension iron. This type of hair extension is also called "Fusion". The keratin tip may need to be trimmed to remove the excess keratin.Brand Name: Blueforest Hair Keratin Shape: I tip, U tip, V tip, flat tip Length: 12", 14", 16", 18" 20", 22", 24", 26", 28", 30" Color: any colors you like Style: straight, body wave, loose wave, natural wave, deep wave, deep curl Weight: 0.5g/ pc, 0.6g/ pc, 0.7g/ pc, 0.8g/ pc, 1g/ pc or customized Payment: PayPal, MoneyGram, Western Union, Bank