เหล็กกล่องเหลี่ยม (Square Steel Pipes)

ขนาด (นิ้ว)                   ขนาด OD (มม.)                ความหนา(มม.)

1/2”x1/2”(4 หุน)        12.7×12.7                       1.2-2.3

3/4”x3/4”(6หุน)         19×19                              1.2-2.3

1”x1”                           25×25                             1.2-2.3

11/4”x11/4”               32×32                             1.2-2.3

11/2”x11/2”                37×37                             1.2-3.2

2”x2”                            50×50                              1.2-3.2

3”x3”                            75×75                              1.5-3.2

4”x4”                            100×100                          1.5-3.2

5”x5”                            125×125                          2.3-3.2

6”x6”                            150×150                          2.3-3.2