Bsk has fresh water. It may be far from Boluo. You have to look at the purpose. Fresh water is much better. What hardware, plastic, PVC, PV, PVR are sold in four directions at the intersection? There are many models you mentioned. If you think it's not far, go and have a look when passing through fresh water. It must be cheap to sell in bulk. I saw others in some warehouses over there! I hope you can buy it right away, and I hope you are satisfied! jwy