Eric I think so. I'm going up to my local Tru-Value later to look for them.
For the 425 yes all three are the same unit, it's the 525's that have 2 different O-Rings.
I also realize I forgot to put the composition material is... N-7044
Material: O-Ring Composition N-7044 : 70 durometer nitrile, internally lubed with RTD's proprietary organic lubricant
Compound Details: N-7044 70 durometer nitrile, internally lubed with RTD's proprietary organic lubricant
Status: Non-Stock Compound
Flags: FDA Internally Lubed
Essentially Buna-N available at bLowes or Dome Hepot or Ace or name it...
O-Ring composition compatible with Beer!