AiM-L Vet Caps 150 ct VetCaps are softgel capsules containing liquid parasiticide for horn fly and lice control in cattle over 600 lbs. VetCaps are fired from a VetGun (sold separately) at a range of 15' - 30' away. Capsules burst upon contact with the animal to deliver insecticide in a similar way to pour-on products. The tell-tale fluorescent orange spot will tell a producer the product is on the animals hide. Each VetCap contains 10 ml of lamda cyhalothrin with piperonyl butoxide