OpalDam light-cured resin barrier is a passively adhesive (sealing) methacrylate-based resin barrier used for isolating tissue adjacent to teeth being whitened. For single-tooth whitening, it may be used to protect adjacent teeth. OpalDam Green resin barrier ensures a safe, unmistakable barrier every time. Contains 4pcs 1.2ml OpalDam Green syringes, 10pcs 20ga micro tips and 10pcs black mini tips.