Ready to diy your own laminar flow hood we have the filter and blower ready for you to make your own includes a 18"x24" bonsai hepaflow-xl 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 18"x24"x2.7. The included blower is already wired with an in-line switch and is design to work with the 18"x24" hepaflow-xl. Using the filter and blower together, it is designed to give you true laminar flow. The included blower is 1/10 hp and produces 549 cfm at 1430 rpm.