3 FT. METAL SAMPLING TUBE FOR DUCT WIDTHS 2 FT TO 4 FT (0.6 TO 1.2 M)
DUCT SAMPLING TUBE 3’ WITH HOLES 3 FT. METAL SAMPLING TUBE FOR DUCT WIDTHS 2 FT TO 4 FT (0.6 TO 1.2 M)