THIS ITEM IS A HONEYWELL MICRO SWITCH SENSITIVE, NSN 5930-00-878-3159, OTHER NUMBERS 91929 P/N U3-1002, 97105-51. STAMPED ON UNIT AS FOLLOWS V3-1002 MS25253-3  91929. EXACT SPEC ON HONEYWELL SITE IF YOU NEED ANY EXTRA INFO. OVER 100.00 POUND,S ON SOME SITES. YOU WILL RECEIVE ONE SWITCH FROM PACK OPENED BY ME FOR PICTURES. WILL NEED CHECKING BEFORE USE.