This excellent collet chuck, manufactured by Shobha, represents a real price breakthrough. The chuck accepts standard ER25 collets and has the correct thread and mounting register for your Myford ML7 & Super 7; which means it is perfectly compatible with the Myford range.
ER 25 collets are readily available and we stock the Vertex brand. These are far more superior to the many Chinese versions being marketed as they are produced to DIN specifications.
Buy the Soba ER25 Collet Chuck at: https://chronos.ltd.uk/acatalog/Soba-ER25-Collet-Chuck-To-Suit-Myford.html