Compact/Tristar Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart Compact/Tristar A101 (EXL) Canister Vacuum Dome Filter - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. Compact/Tristar Dome Filter for model A101 (EXL) canister vacuum.