South Korean slugger Lee Seung-yeop has decided to donate the home run ball and the bat used to hit his 400th homer to the Korea Baseball Organization.

According to Japan’s sports newspaper Sports Nippon Thursday, Lee expressed his intent for the donation, adding that the bat and ball will become a timeless treasure for Korean baseball fans.

Lee hit the two-run homer during a game with the Hanshin Tigers on Tuesday, becoming the third in the world to hit four hundred homers before the age of 30 after Japanese ballplayer Sadaharu Oh and American Alex Rodriguez.