Solitude igr is a feed-through fly preventive which, when mixed 1 2 oz into a horse s ration daily. Cyromazine, the active ingredient in solitude igr will prevent house and stable fly development. Cyromazine has a well documented safety and efficacy profile. Repeated studies show up to 100% efficacy in inhibiting larvae development. Significant results may be observed within 2 weeks but the full benefit should be realized within 4-6 weeks. Solitude igr is intended for use only in equidae includiSize is 20 Pound. Dimensions are 12 X 9.937 X 13 2.12%cyromazine. UPC Code = 087219086001