i got this after giving my firend my old barrel plug ( hes just starting) for like 5 bux. It works, has bright colors so refs wont freak out when they think youre not using anything on your barrel, umm...neoprene is nice...reinforced end...cool rubber redz badge...yeah.
(more words) they come in red, blue and yellow, have an adjustable elastic string to fit most different barrel sizes. there, you happy now, you bloody computer?
Conclusion:
probably the best barrel-blocking device on the market. Im keeping mine for along long long long long long long long long time.