Although the pictures explain a lot, my items are the best in the biz for your HPA needs. You will have near perfect consistency, and will have products that last for years to come. These are top line, and my price, which is overall pretty firm, gives you over 100$ off retail. Message me with any questions, these items work excellently. Take care, thanks for your time! The hydro had I’ll several years until expiration, and I will include a 10ct bag of o’rings in case they break due to low temperatures. The regulator is the redline sfr, to satisfy any confusion.