Roundup® 5708010 Ready To Use Extended Control Weed & Garden Killer, 1.25 GallonKills weeds and prevents new ones from growing for up to 4 months. This refill is ready to use so there is no mixing and no measuring. There is no worry that you've mixed your refill too weak or too strong because it's already mixed to the perfect ratio for you! It's easy and economical. 1. 25 gallon Ready to use Easy, no mixing, no measuring way to refill roundup pump 'n go extended control sprayer Kills existing weeds & grasses, roots & all Kills