Fabricados sob Norma ABNT NBR 15217, em aço galvanizado a quente com cobertura de zinco Z275. Garantem resistência mecânica e durabilidade em condições de uso extremo.
| A | B | C | |
| M 48 | 36,5 mm | 46,5 mm | 6 mm |
| M 70 | 36,5 mm | 68,5 mm | 6 mm |
| M 90 | 36,5 mm | 88,5 mm | 6 mm |
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