Duct Clamp, Compatible Grainger Part Number 30RV49, 30RV50, 30RV51, 30RV52, Compatible Manufacturer Model Number PAB2K-973, PAB2K-993, PAB2K-99ALM, PAB2K-GP3, Duct Clamp, Overall Depth 1/2 in, Overall Height 1/2 in, Overall Width 12 in, Compatible Product Type Portable Negative Air Machine, Stainless Steel. This item has been restricted from sale in the following state (s): []