Seems rather dear for carriage,which website are you getting them from ? http://www.avenueag.co.uk/ProductGrp/0022000e000900030001 http://agricultural.spaldings.co.uk/Shop/ProductDetails.aspx?CatalogID=18397 http://www.apm-supplies.co.uk/bird-scaring-rockets-p-983.html http://www.hisltd.co.uk/Portek-Bird-Scaring-Rockets.html £5:95 here ? Portek have a good reputation. I have never used them but I can guarantee that Percy does not like loud bangs. Wish our Fed would buy some,would be very useful for our first two young bird races which are in Peregrine Country. Lindsay