The 1905 ladle has a 3" diameter cup to hold up to 1-1/2 lbs. of lead and is designed to pour larger cavity molds. The 1911 has a 2-1/2" diameter cup to hold up to 1-1/4 lbs. of lead. The 1911 has a shorter handle design for better agility and ease of pouring. Both models feature left and right pouring lips and are intended for use with the 1904 cast iron pot.