5 x breech o ring seals for the Airgun Technology Vulcan & Vulcan 2 air rifle / airgun.
Sits inside the barrel – commonly replaced spare, original spec.

O Rings:
Part 86 – breech .177 (4.5mm): BK44 – Pack of 5
Part 86 – breech .22 (5.5mm): BK55 – Pack of 5
Part 86 – breech .25 (6.35mm): BK62.5 – Pack of 5
Part 86 – breech .30 (7.62mm): BK65.8 – Pack of 5