Item #	Dimension A	Dimension B	Tube Size	Orifice	Hex
U-FF-4	2.49 in	1.15 in	1/4 in	0.125 in	11/16
U-FF-6	2.71 in	1.25 in	3/8 in	0.25 in	13/16
U-FF-8	2.93 in	1.35 in	1/2 in	0.38 in	15/16
U-FF-12	3.25 in	1.50 in	3/4 in	0.63 in	1 3/16