Ronaldo and the Nike Mercurial R9's | The Football Fanzine
Nike Mercurial R9 1998 Black White SG – Classic Soccer Cleats
Nike Mercurial World Cup football boots from 1998 to 2010
Collector boots Ronaldo Nike Mercurial R9 ref 117311 size us8 RARE inter milan | eBay
I believe these are the mercurial r9 from 1998. I remember having a pair with the same colorway but without cleats. For indoor soccer I believe but can't find any info online.
Nike Mercurial Vapor IX SE FG MVXV (Ronaldo R9 1998) - Unboxing + On Feet - YouTube