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.
Rare Nike Mercurial R9 Ronaldo World Cup 1998 2.1 FG | eBay
I custom made Ronaldo R9s 1998 Nike Mercurial Vapor's : r/bootroom
Nike Mercurial World Cup football boots from 1998 to 2010
Indonesia International Bachdim Shows Off Nike Mercurial 1998 Boots - Footy Headlines
Collector boots Ronaldo Nike Mercurial R9 ref 117311 size us8 RARE inter milan | eBay
Nike Mercurial World Cup football boots from 1998 to 2010
Nike R9 98 Boot Line Drawing Print - Etsy
1998 NIKE MERCURIAL R9 SG : r/OldSchoolFootball
Nike celebrate 15 years of Mercurial and recreate the R9 boot
Unboxing - Nike Mercurial Vapor IX "R9" Special Edition - YouTube
Nike Mercurial FG 1998 R9
I custom made Ronaldo R9s 1998 Nike Mercurial Vapor's : r/bootroom
Nike JR Ultraccel R9 F.G Ronaldo 38.5 UK 5.5 new World Cup 1998 117309 w/ box | eBay