Sometimes spelled differently (Shindri, Sindiri, etc), this mango is thought to be from Pakistan, where it is very popular. It is also grown on some scale in northern India as well. It is an oblong-shaped yellow mango and the eating quality is supposedly excellent.
We obtained a tree a number of years ago and it has grown very slowly, without flowering, making it one of only a few holdouts at its age to have not fruited for us yet.
We are optimistic it can fruit here based off of reports from the USDA and hope that it can do so in 2020