Lincoln Service Parts 1 › Lincoln Electric 9SG11356-38 SIGHT GLASS, O-RING, TMBD 1 5/16 - 12 SA G11356-38 Lincoln Electric 9SG11356-38 SIGHT GLASS, O-RING, TMBD 1 5/16 - 12 SA G11356-38 Sale Price: $152.53 Original Price: $175.41 SIGHT GLASS, O-RING, TMBD 1 5/16 - 12 SA PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! SIGHT GLASS, O-RING, TMBD 1 5/16 - 12 SA PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1