Neogen Prozap® StandGuard® Pour-OnNo dilution necessary, simply use as pour on along the back of beef cattle Most potent pyrethroid on the market Season long lice control with one application Contains gamma cyhalothrin, the latest technology for beef cattle in the pyrethroid class Smaller dosage rates, thus lowering cost per head treated and less effect on the environment 473 mL bottle treats up to 48 head of cattle weighing 600 lbs or less. 900 mL bottle treats up to 90 head of