Akron Brass AFTK-25 [AFTK-SK-KIT] 2 1/2'' (65 mm) Flow Test Kit with Case (Low Flow Kit). Apparatus flow test kit are available in two configurations.  Choose from a low range flow kit including 3/4", 1", 1 1/4", 1 1/2" and 1 3/4" tips or a high flow range kit including 1 1/2" 1 3/4", 2", 2 1/4" and 2 1/2" tips.  Tips can be purchased separately and  range from 3/4" (19mm) to 2 1/2" (65 mm) in 1/8" (3 mm) increments.