Features: brand new and high quality Compatible for 850 850A 852 852D 852D+ and air pump type hot air soldering station. These nozzles are adopted of good quality steel, not easy to rust. With the lock screw which can lock the nozzle firmly, so effectively avoid hot air flow out from the for gap between the nozzle and the heat gun air outlet steel pipe. This nozzles are suitable for many kinds of hot air soldering station, exquisite workmanship, with long service life. Suitable for a variety of hot air rework station, the installation is very sturdy, and very easy to replace. Specifications: Material: metal Outer diameter: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm(optional) Package Includes: 1PC x 858A 858D Circular Nozzle note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!