Composi-Tight 3D Fusion Wedge Bulk Kit, 400/Pack, Assorted. Wedges fuse two materials together to produce the perfect combination of adaptability and retention. Soft, rubberized material is fused to the firm plastic core. Ultra adaptive with soft retentive fins. Gently molds itself to root irregularities as you insert it providing an unsurpassed seal. Package of 400 wedges