O.S air cleaner for .10 to .15 size OS Max car engine are heavy-duty wet type, two stage filter, air cleaner. Contains specially impregnated filter elements which prevent highly damaging dust and dirt from being drawn into the engine from the carburator. Special rubber body press fits on, securely fitting with positive seal at the carburettor air intake. This product includes one rubber body (boot), and three foam air filters.

Filter Oil (shock oil can also be used)

Throat Size: 10mm