Model SPJ-96-X4RT8 Clean Air Plenum with Railing Top Access Doors and On-Demand Cleaning System (TOP) and Dirty Air Plenum, Bolt-Together Hopper, Fan, and Flex-Tip Rotary Air Lock (BOTTOM) painted to match that will handle Compost Dust at an Air-to-Cloth Ratio of 11:1 loaded up and ready to head to the customer!