*PLUMBERSSTOCK EXPERT* responded:
Thank you for your interest in the Ridgid 73637! This Filter Cage is designed to be used with the Wet/Dry Vac models WD3050, WD4070, WD4522, WD0671, WD1270, WD1450, WD1680, WD1851, WD1956, RV2400A and RV2400B only. This is a replacement part that holds the filter in place and is made of plastic with an updated design compatible with the new style filters. Always remember to click Add to Cart to confirm your order, enter your zipcode and you’ll be all set!