As per your project of selling car accessories and the items which are included such as Vacuum attachment and the car headrest hook with phone holder both are very valuable and mostly used items nowadays because car gets dirty and after cleaning , vacuum tends to lie down in the car here and there so vacuum attachment is necessary.
Where as car headrest hook with phone holder is necessary to avoid scratches on the mobile when cell phone is in the car ,
So as per the project it only requires proper knowledge and proper marketing as per the needs .
Regards
Ummer Shafiullah