Clamp, Rubber Dam #27, Black Line Clamp, Rubber Dam #27, Black Line RDCM27X Flat jaws for large molars. SKU Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.