Unidose Kit Contains: 50 unidose self-etching primers (0.18 ml each), 50 unidose universal adhesives (0.18 ml each) 100 applicators, directions for use and 1 technique guide OptiBond™ eXTRa Universal is a two-component universal light cure adhesive, providing outstanding adhesion to all composite, self-cure, dual-cure and light-cure resin cement and core build-up material eliminating the need for any auxiliary product. OptiBond™ eXTRa Universal can be used for both indirect and direct applications without the need for a secondary bonding system or auxiliary product. Can be used in Self-Etch, Selective Etch, and Total Etch techniques. Feature: Self-Etch, Selective Etch and Total Etch Techniques Two-Component only GPDM Monomer Ternary Solvent System Smart pH Technology Benefit: Etching Versatility Consistent and simplified protocol. Superior bond strength Effective enamel etching and dentin tubule penetration Outstanding indirect compatibility