Looking for a professional quality hair extension heat connector or fusion applicator? HairXtensions.co.uk stock a selection of the best heat connectors available on the UK Market. Fusion heat connectors are used to attach the Flat Tip and Nail Tip (u-tip) pre-bonded hair extensions by melting the keratin tips. All extension connectors we supply are salon-graded, tried and tested by experts and affordable priced. Next-Day Shipping Available!