Item #	Dimension A	Dimension B	Tube Size	Orifice
UE-FF-4	1.83 in	1.83 in	1/4 in	0.125 in
UE-FF-6	1.93 in	1.93 in	3/8 in	0.25 in
UE-FF-8	2.03 in	2.03 in	1/2 in	0.38 in
UE-FF-12	2.18 in	2.18 in	3/4 in	0.63 in