The Brand, Series 84 is a two port, non-adjustable, inline, fixed orifice with free reverse flow. The flow is determined by the orifice diameter and fluid pressure. The orifice diameter must be specified by the customer when ordering (up to a diameter of 0.250" (6.35mm)). The orifice plate is held in place when it is connected to a #8 SAE male fitting. This restricted flow assembly is inexpensive and gives the customer the ability to change the orifice diameter by swapping the orifice plate with another that has a different orifice size.