This is the Official Dual Action Inline Water Base from Grav Labs, this is definitely a one of a kind glass piece.
This glass piece is a base that you can attachments to make it into the ultimate bong so you can have an ultimate bong experience. The attachments for this piece would be a neck piece that will fit into the joint provided on the base, then for the nail and bowl attachments you can either buy new ones to fit them or use your old ones. This way if you can use your own attachments and only have to buy the base
Cleaning the base of the bong is simple, you will need some supplies in order to give your base a good clean. The supplies are isopropyl alcohol, fresh water and paper towels. First thing you will need to do is mix the isopropyl alcohol and the fresh water together in a jar, simply pure the mixture into the base of the bong and give it a good swirl to remove any colouring or dried products that might be stuck at the bottom. When you feel the base is fully clean, pour the mixture back into the jar and rinse out the base and dry it with the paper towel. Now with the jar of leftover solution you can use it for your attachments to give them a good cleaning, I would recommend you leave them in there for an hour or so to give them a proper cleaning. Remember the cleaner the bong is the cleaner the hits are.