Thank you for viewing. Material: Ductile iron (FCD450) - Pack of 8 Surface treatment: Electrolytic zinc plating ※1 Set screws: M16-16 (electrolytic zinc plating) ※1 ※2 Fastening hardware: R-8 (8mm) L-shaped bar wrench ※1 Rust is very likely to occur depending on the environment in which it is used, so be sure to take rust prevention measures. In addition, we recommend regular inspections and maintenance even after rust prevention measures have been taken. ※2 The necessary number of screws for the hardware are included.