OptiBond eXTRa Universal Dual Cure 5ml Bottle Kit, Single Kit. Contains: 1 Bottle Primer (5ml), 1 Bottle Adhesive (5ml), 50 Applicators, 25 Mixing Wells, 1 Technique Card. Two-component universal light cure adhesive. Provides 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.