301D (24ltr) 5:1 Ratio West System® Dispensing Pumps are to be used with 105 Resin and either 205 Fast or 206 Slow Hardeners only.
West System® brand pumps mount directly onto 105 Resin 20 litre bottle and the 4 litre Hardener container. They are calibrated to dispense the correct ratio of resin and hardener with a single full stroke of each pump.