Opalescence Pro 40% Teeth Whitening Gel Syringe Refill, 20 x 1.2 ml Syringes, Ultradent

Opalescence Pro 40% is a high-water-content in-office teeth whitening gel refill kit from Ultradent, supplied as 20 syringes of 1.2 ml each. The formula contains at least 20% water to help keep teeth hydrated during treatment, which may reduce the sensitivity and dehydration associated with lower-water whitening products. It is designed for professional in-office whitening and helps minimize shade relapse compared with competitor whitening gels.