Nike Mercurial Superfly IV Heritage iD FG Ronaldo R9 1998 World Cup US 11.5 | eBay
Nike Mercurial World Cup football boots from 1998 to 2010
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 Air Max Mercurial R9 98 QS Unboxing - FOOTY.COM - YouTube
Nike Mercurial 1998 R9 Black White FG – Classic Soccer Cleats
Nike Mercurial Vapor IX SE FG MVXV (Ronaldo R9 1998) - Unboxing + On Feet - YouTube