Lincoln Service Parts 2 › Lincoln Electric 9SS29420-21 MOMENTARY TEST SWITCH S29420-21 Lincoln Electric 9SS29420-21 MOMENTARY TEST SWITCH S29420-21 Sale Price: $49.02 Original Price: $56.37 MOMENTARY TEST SWITCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! MOMENTARY TEST SWITCH PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1