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.
Collector boots Ronaldo Nike Mercurial R9 ref 117311 size us8 RARE inter milan | eBay
15 years with the Mercurial R9 - The original faces off with the heir
15 years with the Mercurial R9 - The original faces off with the heir
Nike Mercurial II 1999 SG Ronaldo R9 Signed Sample – Classic Soccer Cleats