Fits Oregon chain numbers: 16H, 18H, 26, 26P, 27, 27A, 27R,
27RA, 58J, 58L, 59J, 59L, 72AP, 72DG, 72DP, 72JG, 72JP,
72LG, 72LP, 72RD, 72V, M72LP, 73DG, 73DP, 73JG, 73JP,
73LG, 73LP, 73RD, 73V, M73LP, 75DG, 75DP, 75JG, 75LP,
75RD, 75V, M75LP.
Also fits chains by other brands.