The athena fork oil seals for ducati monster 600 1998-1999 is part of the latest collection from athena.Features: athena offers the most complete range of fork seals high-quality athena replacement fork seals meet or exceed oem quality sold in pairs note: inner diameter i.D. Is the distance from the inside rim of the fork seal to the opposite inside rim of the fork seal. Outer diameter o.D. Is the distance from the outer rim of the fork seal to the opposite outer rim of the fork seal. Specifications:units: pairto fit: ducati monster 600 1998 dark european models ducati monster 600 1998 european models ducati monster 600 1999 dark european models ducati monster 750 1998 all models ducati monster 750 1999 city dark european models ducati monster 750 1999 city european models ducati monster 750 1999 all models ducati monster 900 1993 european models ducati monster 900 1994 all models ducati monster 900 1995 all models ducati monster 900 1996 all models ducati monster 900 1997 all models husqvarna sm 125 s 1998 european models manufacturer part number: p40fork455087view all athena. View all parts and spares.