Ready to diy your own laminar flow hood we have the filter and blower ready for you to make your own includes a 12"x12" bonsai hepaflow-12 and a pre-wired centrifugal blower. This hepa mini pleat filter is 99.99% at. It has an aluminum frame with a robust gasket. The size of the filter is 12"x12"x2.7. The included blower is already wired with an in-line switch and is design to work with the 12"x12" hepaflow-12. Using the filter and blower together, it is designed to give you true laminar flow.