International Code	size	Thickness
SB4015C	15X4	2.5
SB4215C	15X4¼	2.5
SB4415C	15X4½	2.5
SB4020C	20X4	2.5
SB4220C	20X4¼	2.5
SB4420C	2OX4½	2.5
SB4022C	22X4	2.5
SB4222C	22X4¼	2.5
SB4422C	22X4¼	2.5
SB4015K	15X4	3.5
SB3320K	2OX3 3/8	3.5
SB3520K	2OX3 5/8	3.5
SB4020K	20X4	3.5
SB4220K	20X4¼	3.5
SB4420K	2OX4½	3.5
SB3322K	22X33/8	3.5
SB3522K	22X 3 5/8	3.5
SB4022K	22X4	3.5
SB4222K	22X4¼	3.5
SB4422K	22X4½	3.5
SB4015R	15X4	4.5
SB4020R	20X4	4.5
SB4220R	2OX4¼	4.5
SB4420R	2OX4½	4.5
SB4022R	22X4	4.5
SB4222R	2OX4¼	4.5
SB4422R	22X4½	4.5