Panasonic C-13 compact canister vacuum cleaner bag AMC-S5EP (AMCS5EP).
The Panasonic C13 disposable paper dust bag is designed to fit the following Panasonic canister series:
MC-3300 MC-3900 MC-600 MC-L50 MDC-E600
Specific examples include Panasonic MC-3920, MC-E603 and MC-E601.
The C-13 canister vacuum bag is made by Panasonic. 5 vac bags in a package.