Dear Chan,
1. 2 failed cylinders : As I mentioned, we replaced with our 2 new cylinders. (we charge you only 1, and we will exchanged to the manufacturer for free)
- That pin hole found cylinder is must destructed here.
2. We are going to give this time PO same as isotank price ($2.78). And we will let you know further price after discussed with my boss.
3. Just give me this PO# so that I can make PI.