Yellow sliotars are to be used for the first time in an All Ireland Senior Hurling Championship.
The GAA have confirmed that the luminous creations will make their debut for all 2020 Championship matches.
White sliotars can no longer be used.
It's just one of a number of guidelines and tweaks introduced for a coronavirus-delayed championship.
The yellow balls were previously used at the Fenway Classic in Boston.
One water-break per half will be allowed, and they'll occur between the 15th and 20th minute of a half when the ball goes out of play.
Those breaks will last no longer for a minute, with the GAA saying, "Players coming to the area in front of their team zone and using clearly marked personal bottles, or single-use bottles should be used for fluid intake."
With this in mind, Maor Uisce are no longer permitted in either football or hurling.
To regulate the number of players permitted in grounds, a 'controlled zone' will be implemented allowing 26 players per senior team, and 24 for Minor and U20.
Teams will be allowed a maximum of 12 backroom personnel each.
In total 40 persons per senior team and 38 persons for all other age-grades, are permitted access to the controlled zone.