i'm looking to replace the poppet valves on my corny's but i am not sure which type to get.what i do know is that they are firestone pinlock type but every where i look they sell 2 types of poppets.no where on the keg do i see anything other than the firestone logo.i don't see what type of firestone (i.e.challenger...etc)can anyone help me out so i don't have to order these twice when i don't order the right ones the first time?