Hi i went to purchase the west system epoxy and hardener, i did not buy them because i got confused with the different numbers on the epoxy and hardener. for a crystal clear finish what is the number for the hardener and epoxy and what color is the number.

Rolf:
As Nick said, 207 Hardener is what you want. All the WEST hardeners work with the same 105 resin, but the ratio of hardener to resin is not the same for the 207 hardener as for the 205/206 hardeners. The WEST pump set has a special pump for the 207 hardener, so it's not a big deal if you are using the pumps (which I recommend). Just remember it's 'one measure from the resin pump, one measure from the hardener pump' and you will be OK.