I always like to keep these around and change them out on a regular basis. Stan's is worse than Orange seal but sealant will clog up in the valve core and make it difficult to put air in the tire. Good item to have in stock at your in home bike repair shop.
Good value and they function well so far. Ships with a small core remover in case you don't already have one. Good choice for tubeless setups to replace the cores after they get plugged up with sealant.
Fits good in Stan's and Bontrager valves, but the quality and finish is not equal. Thread is't smooth as the original cores. Of course, it's a 10 pack, a great deal. Sealing is correct, thanks in part to the sealing fluid. Take a core for your trips, you can break one ;-)
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