The Carrier shown here is a Motorized Carrier that accepts both, 16mm and 35mm microfilm in open reels and standard microfiche or jackets. This Carrier will work in the Indus Readers Models 4601-01, 4601-02, 4601-03, 4601-06, and 4601-11. With special modification this Carrier can be used for the 4601-A3. Specify if required for 4601-A3.