American standard
| Dimension | Standard | Steel |
| SMLS CONCENTRIC REDUCERS 1* 1" x 1/2" SCH 40 - 14" x 12" SCH 40 | ASME B16.9 | A234WPB |
| SMLS ECCENTRIC REDUCERS 6/4" x 1" SCH 40 - 10" x 8" SCH 40 | ASME B16.9 | A234WPB |
*Dimension till 3 "x 2 1/2” – SCH 40 and SCH 80, dimensions 4 "x 2” SCH 40.
European standard
| Dimension | Standard | Steel |
| SMLS CONCENTRIC REDUCERS 26,9 x 2 / 21,3 x 2 - 323,9 x 8,8 / 273 x 8,8 | EN10253-2 | P235TR1/P235GH |
Standard wall thickness.