I'm summer , Van's colleagues.
1).Your invoice issued correct model number and correct photo which it is CH-926 (Aluminium Alloy) + Aluminium Alloy Button as i confirmed.
The materials used are the same, CH-926 just silver plating on the surface.
Due to the high temperature for silver plated will be easy to fracture, the factory does not silver plated again and change model number from CH-926 to JY-926.
so why CH-926 is (Aluminium Alloy) + Aluminium Alloy Button and JY-926 is (Aluminium Alloy) + Plastic Button
2). Once arrival here all is model no.JY-926 (Aluminium Alloy) + Plastic Button as attached photo.
as above
3). Also I found out damaged total 7 pcs so can I send back them to supplier for repairing these 7 pcs because you said they cannot replace it but they can repair for.
It's ok. When the factory recwived will repair asap.
Any question please do not hesitate to contact me!