The 821 Rubber/Friction Top Series is a tabletop conveyor series with a flat surface, but it features integrated rubber strips/pads that provide higher friction with the product. Its primary purpose is to: Fix packages/cartons to inclined belts and reduce slippage during incline or downcline. Maintain proper spacing of packages and minimize skewing during in-line transfers and conversions. Suitable for applications such as: Incline/Decline + Stop Belt + Packaging lines for cartons and packages. Common manufacturing note: Many 821 series have a 38.1mm (1.5 inch) pitch and are available in various widths depending on the line size.