Inner air filter.
Fits the following IH models: 1066, 1086, 1466, 1486, 1566, 1586, 1800 Cotton Picker, 1822 Cotton Picker, 1844 Cotton Picker, 2022 Cotton Picker, 2044 Cotton Picker, 2055 Cotton Picker, 3388, 3588, 3788, 4386, 5088 Combine, 5288, 5488, 6388, 6588, 6788, 7288, 7388, 7488, DTI466B Eng. OEM: 67975C1. Air Cleaner No 535003R91.
Inside Diam.: 1/2 (12.7), Outside Diam.: 5-9/16 (141.3), Length: 15-21/32 (397.7)