Identify Fine Finish Tip Replacement Interval

should be using them and just to you'll get right to it i use an like a fine finish tip this is a tri-tech fine finish tip fine finish tips last 20 gallons maximum before you're really not getting a true fine finish out of it you're not getting the performance out of the tip how long does a production tip i don't have a production tip here but say like a titan production tip bedford tip um