1:144 WWII German 2 cm Flak 38 Metal Barrels (Set of Four) (Brass, Unpainted, Unassembled) Four metal (brass) barrels are included in this package for your conversion need. Every piece is precisely machined in 1/144 scale. You will need a 0.55 mm diameter drill bit to drill holes in your receiving model to fit the pin of the barrels; and a 0.7 mm drill bit if you want to accommodate for the thicker barrel sleeve.(The pin is 0.36 mm and the sleeve is 0.66 mm in diameter respectively. Perfect for converting you 2 cm Falkvierling 38, Flakpanzer IV Wirbelwind, or even used as 2 cm KwK 30 on the SdKfz 222 or 2 cm Haengelafette 38 turrets. Sample Usage (Vehicles NOT included) You only purchase FOUR 2 cm Flak 38 metal barrels. TRUE 1:144 SCALE Not "N" scale or 1:160. Made in Hong Kong