Tube Specification	Size(inch)	OD(mm)	Thickness(mm
3A-BEVEL SEAT	1"	25.4	1.65
3A-BEVEL SEAT	1.5"	38.1	1.65
3A-BEVEL SEAT	2"	50.8	1.65
3A-BEVEL SEAT	2.5"	63.5	1.65
3A-BEVEL SEAT	3"	76.2	1.65
3A-BEVEL SEAT	4"	101.6	2.1