Remembering R9's World Cup Boots: 1998 – 2006 - SoccerBible
Nike Mercurial Vapor IX SE FG MVXV (Ronaldo R9 1998) - Unboxing + On Feet - YouTube
1998 NIKE MERCURIAL R9 SG : r/OldSchoolFootball
Most expensive World Cup memorabilia, from Nike Mercurial boots worth £3,500 to an official France '98 ball costing £500 | The US Sun
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 World Cup football boots from 1998 to 2010
15 years with the Mercurial R9 - The original faces off with the heir
Nike Mercurial R9 1998 SG
FirstAceSports - Nike Mercurial R9 1998 Black White SG
Nike Mercurial 1998 R9 Black White FG – Classic Soccer Cleats