Batch wise quantity

i have item in stock batch wise. Each item have different batch and different weight. When i am creating sales invoice and select batch. Item weight is not coming.
I want when i will select batch automatically weight must come in invoice.
Please let me know how can i do?

Add custom data field inBatch called “Batch Weight”

When you add stock in Stock entry/ purchase receipt then when you mention batch that time you can fill in the batch weight.

Similarly In sales Invoice Item form add batch weight using batch.batch_weight

Hope this helps.