INCLUDES 4PCS 49-90-1951 replacement filters (part# 49-90-0160) to help capture particles that could harm the motor and decrease performance. COMPATIBILITY: Compatible with for Milwaukee M18 compact vac 0882-20. perfect for capturing sawdust, general debris, cold ashes, drywall sanding and fine powders found in the home, garage, or shop. EASY INSTALLATION, no tools or hardware needed. Change filter when vacuum performance decreases, when your vac has a clogged or dirty air filter it can cause it to work harder which will end up hurting your electric bill. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Quantity:4Pack Colour:Black Material:Plastic Package Contents: 4 * Vacuum Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.