Watkins™ Petro-Carbo Salve, invented in 1888 by the J.R. Watkins Medical Company, has been relied upon for generations. This uniquely formulated topical analgesic has spruce, camphor and cajeput oil. Relieves pain and itching of minor cuts, burns and various skin irritations. Works to draw out slivers. A medicine cabinet shouldn't be without this protective salve. Tin is 4.38 ounces.