Hi Eli12

They are 6mm dia. for most all the leds on HL tanks.
I made some mods to my T26E3 Pershing puting the hull machine gun into the gun barrel. how I did this was I used a multiple pack of
6mm and 3mm leds- red, green, yellow and white. They wern't. much. Pack # 2761622 $2.99 they are pretty bright and you can trim them flat
with a flush cut nippers, just dont cut the metal wires inside or they won't. work, use a little Tamiya clear colors on the cut ends, brings the gloss
back.