Silicone Strip (18) Silicone Strip (18) PTI-0020 Replacement Rail with Slit for Large 18 and 24 Instrument Resin Cassettes IMS-1118 and IMS-1124. 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.