P028-25 Repair Kit, 2.678" Dia. x .025" Diaphragm, "Zero Series" (2011-Current) including (1) P028-25 Diaphragm, (2) P321-17 2-11/16" O-Rings. One diaphragm kit per horn body, Items 4 and 5 per Drawing 3-6240-A.

P028-25 Repair Kit, 2.678" Dia. x .025" Diaphragm, #0 Horns (2011-Current) including (1) P028-25 Diaphragm, (2) P321-17 2-11/16" O-Rings. One diaphragm kit per horn body, Items 4 and 5 per Drawing 3-6240-A.

Note:  For 2011-Current Kahlenberg Model S-0A, D-0A and T-0A (Zero Series) Air Horns.   If your horn has 2 large O-Rings and 1 diaphragm, this is the correct kit.   If your horn has one large and one small O-Ring, see P028-04 Repair Kit.