General purpose one inch long reed switch, normally open contacts, spst. dims: glass : 3.5mm diameter x 27mm long , leads: 0.75 x 9mm long total overall length approx 46mm Status: NOS (New Old Stock) Bulk purchase from major UK distributor, being sold at a bargain price ! Tested components: YES ... quite sensitive, great for model railways, and craft projects. RoHS compliant: no