5/8 dram (2ML) size. These include orifice and black cap for each bottle.
You get 144 bottles, 144 orifices, and 144 black caps.
Simply fill the empty bottle with your favorite oil, snap in the orifice in the top and screw on the black cap.
Depending on the thickness of the oil, these bottles hold roughly 25-40 drops.
This product comes shipped in a pack of 144.