Delete operates by providing an environment which is totally unacceptable to lice, ticks and other ecto-parasites. This product is licensed with the Health & Safety Executive (No: 8749) as approved under 'The Control of Pesticides Regulations 1986 (as amended)'. The active component is Citriodiol, which will cause any unwanted guests to depart from their host without delay! Piperonal and Cedarwood oil give off a pleasing fragrance. Delete is a free-flowing powder containing no talc whatsoever, and is designed to be easily brushed out from the animal’s coat. All ingredients are confirmed by the makers as being perfectly safe for direct application to all farm stock and pets. Available in 250g shaker pack and 1kg refill.