This is the main undercarriage struts for the ICM, Revell released I-16. These are the kit parts assembled into one part, which then makes an amazing casting that just drops in as a replacement part, and as it is all one part there is no tricky assembly of metal parts.
Note you will need to clean up some casting sprue gates from the parts and the odd small brass 'inclusions' that may appear through the casting process.
Please allow up to 2 to 3 weeks for manufacturing. I will email as soon as I have shipped the parts.