Green CO2 bulb seal for the following Umarex pistols:
– Legends Makarov
– Walther P38
– Walther PPQ
– Colt Peacemaker / SAA
– IWI UZI
– H&K 45 Non blowback
– H&K VP9
– UX Tornado
– UX SA10
– UX SAA Peacemaker
– Race Gun
– Beretta 84FS
– Beretta APX
– Beretta Elite II
– Beretta APX
– Colt 1911 Special Combat Classic
– Colt Defender
– Smith & Wesson M&P45
– Glock 19X
– Glock 17 Gen 5
– Glock Dual Ammo
– S25
– S40

This is the seal against which the CO2 capsule fits and the most common to be replaced.
Generally needs to be replaced if a CO2 capsule has been left in the airgun for a long time, which causes leaks when the CO2 is replaced.