This is a set of AUTO-EXT RING No. 1 and No. 3 extension rings for the Mamiya 645. Includes the instruction manual. - Model: AUTO-EXT RING No. 1 - Model: AUTO-EXT RING No. 3-S - Model: M645 - Type: Extension Ring Overall, it's in good condition for a used item. Please take a close look at the photos and confirm the condition. When using No. 1 and No. 3 together, the mount tightens up. It is recommended to use them separately. Price reduced. 1600 yen -> 1100 yen Thank you for looking.