Best Seller | AIR PRODUCTS & CONTROLS FAST TUBE Sampling Tube,24" L,5/8" H Sampling Tube, Finish Plastic, Duct Mounting, Depth (In.) 5/8 in, Height (In.) 5/8 in, Length (In.) 24 in, Tube Length (Ft.) 6 ft, Width (In.) 5/8 in, Duct Width (Ft.) 1 to 8 ft, For Use With All APC Duct Smoke Detectors ... more AIR PRODUCTS & CONTROLS FAST TUBE Sampling Tube,24" L,5/8" H Sampling Tube, Finish Plastic, Duct Mounting, Depth (In.) 5/8 in, Height (In.) 5/8 in, Length (In.) 24 in, Tube Length (Ft.) 6 ft, Width (In.) 5/8 in, Duct Width (Ft.) 1 to 8 ft, For Use With All APC Duct Smoke Detectors | | $32.95 go to store |