Carburetor float for Zenith number 10987, 12510, 12777, 12879, 12957, 12978, 13209, 13303, 13320, 13327, 13429, 13430, 13450, 13478, 13598, 13638, 13750, 14429, 14990, 15099, 15107, 15108.These carburetors are often found on JD 3010, 3020, 4000, 4010 and 4020 tractors as well as the MM G940, G900, G1000; Oliver 1750, 1755, 1800, 1850 and 1855 and Massey Ferguson 1100 tractors.