This dispenser aids in the transfer of acids and reagents and virtually eliminates accidental bottle breakage and spills by simply squeezing the small plastic bottle. Pressing the pressure release button stops the flow instantly. The pump is easily assembled and installed on 5 pt. (80 fl. oz.) acid bottles, 1/2 and 1-gallon jugs, 2.5 and 4 liter bottles, or any similar bottles with GPI No. 38-430 or 38-400 threaded necks. Two adapters provided for short necks. Bottle not included.