Trip Line Activated Alarm Mine: IMPORTANT: Blanks are not supplied with the mine. If you require blanks, please read the carriage and payment details below. Galvanised steel construction Takes short 12G Saluting blanks (Not supplied-see below) Gate/Door/Fence mounted, ideal for sheds, barns, etc. Trip line activated, disturb the line and "BANG" Very Loud!! (Do not, as I have done, forget you have set them!!) To order the mine only, choose the Free Mail Option. To order the mine plus x10 blanks, choose the £23.95 courier delivery method This equates to: Mine £18.95 + Blanks and Courier £23.95 = Total of £42.90 (blanks require higher shipping costs) Blanks cannot be sent outside mainland Britain