《HEAVY GAUGE》为GLAY的第5张原创专辑，于1999年10月20日发行。

• 本专辑是GLAY原创专辑中，总销售量第2高的作品，销售突破200万张，另外推出黑胶唱片版本。台湾亦有发行台压版。
• 专辑CD壳和歌词本在黑暗中会发光。

Heavy Gauge is the 6th album by Japanese rock band Glay. In this album Glay dabbles in the gospel genre for the first time, using gospel choirs in songs such as "Will Be King" and "Happiness". This album also marks a milestone in Glay's career with their hit song "Winter, Again". The song won Single of the Year (1999) at the Japan Record Award. Many songs from the album were used in the Meiji Seika Kaisha advertising campaigns for their "Horn" and "Flan" product food lines. The album reached #1 on Oricon charts and sold about 2,370,000. The album was certified "Double Million" by the Recording Industry Association of Japan (RIAJ).