They enables Rolleicord Va and Vb to photograph in several picture sizes other than 6x6cm with 120 roll film. Picture sizes available with this adapter are as follows :

• 6 x 6cm, 12 exposures
• 4 x 4cm, 16 exposures
• 4 x 4.5cm, 16 exposures
• 28 x 40mm, 24 exposures

In addition to this, Rolleikin, which is 35mm film adapter, enables Rolleiflex and Rolleicord to take in 24mm x 36mm format with 35mm film. Attach each adapter to the back panel and mask over the focusing screen according to the picture size. Also, the frame counter has to be changed to the one fitted with the picture size.
Refer to Rolleicord Vb.