Compatible models: our replacement filter is compatible with for 17816 9-17816 Vacuum Cleaner. It can fit with most 5 gallon and larger vacuum filter. Fit 6 gallons vacs made since 1992 and 8, 12, 16, 32 gallons vacs produced since 1988. High Efficiency Filter: our replacement filter is made of 3 layers of premium material, which can effectively capture dust and fine particles, avoiding vacuum clogging and overheating problems. Easy to install: No extra tools needed. Just remove the old and dirty filter and replace the replacement filter. Cleaning suggestion: Please clean the dust on the filter often to keep its best performance. If your vacuum gets overheating during using, or the suction becomes weak, you should replace the filter in time. A dirty filter greatly reduce suction power. We highly suggest you replacing filter every 3-6 months. Package includes: this filter set includes 2 filters and 2 retainer nuts for Wet/Dry Vacs. We value every customer's suggestion. Colour:White+Black Material:plastic Package Contents: 2 x Filter 1 x Cleaning Brush 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.