REDLAND Evacuation Traps are disposable filters, designed to replace the trap presently in your evacuation unit or cuspidor. improve the performance of your evacuation system. Features and Benefits: Fits Ampco, Belmont, Biotec, Chayes, Dabi-Atlante, Dansereau, DCI, Den-Tal-EZ, Dentech, Forest, Knight, Pelton & Crane, Proma and others – diameter 1 7/8″. Reference No: REDDT-5503 Package contents: 144 Traps per Box