Technology Components › SWITCH - KNIFE TYPE - SINGLE POLE DOUBLE THROW Image 1 of 1 SWITCH - KNIFE TYPE - SINGLE POLE DOUBLE THROW $9.90 Code: EM1587-01 Add To Cart Added! Code: EM1587-01 Knife switch used to control the flow of electricity in circuit experiments. Base constructed of ABS. You Might Also Like Quick View SWITCH - KNIFE TYPE - DOUBLE POLE DOUBLE THROW $15.40 Quick View SWITCH - KNIFE TYPE $8.70 Quick View SWITCH - KNIFE TYPE - DOUBLE POLE SINGLE THROW $11.00