For the UV light stainless steel pipe, there is one screw which can show the light of the UV light , for the screw our engineer worry about that it may not seal well if the customer adjust it several time, it may get water leakage problem, also with UV light lighting every day such screw's material may be changed,also people see the UV light too long time it also will cause eyes problem , so we think maybe you should do a full stainless pipe to storage the UV light so it maybe better