3M™ Impression tray size large (L), upper refill, 71617. Features: - Eliminate the need for a tray adhesive and simplify both preliminary and final impressions with this innovative, single-use tray from 3M. - Revolutionary self-retentive fleece strip eliminates the need for a tray adhesive for fewer handling steps. - Simplified process saves time--up to five minutes per procedure. - Retentive fleece features striations that act as a barrier to avoid tooth. - Tray contact and occlusal flat-spots for better impression results. - Innovative, directed-flow design minimizes flow defects and distal voids for more accurate impressions. - Surrounding retention lip reduces material overflows. - Built-in reservoir reduces gagging for better patient comfort. Suggested applications: - Ideal for both preliminary and final impressions. - Counter models. - Study models. - Matrix for temporary crowns and bridges. - Orthodontic models. Package contents: - 10 - trays, size large (L), upper.