The only problem with FLU is you get back ordered a lot then they jerk you around about getting your order. Been on back order for a few tabs for like 3 months. I call no one ever answers, when they do they just say it will be shipped when they get it. I spend a lot of money at this place like a few grand every couple of months. I am also looking for bulk silicone it seems the only place I've found is in China. If any one has a US manufacture please send me the info would rather support the US economy.