Brand: RadioShack. MPN: 640-0304. Replacement soldering tip for: RadioShack 15W Pro-Line Soldering Iron (Catalog No. 6400205) RadioShack 25W Pro-Line Soldering Iron (Catalog No. 6400206) RadioShack Pro-Line Soldering Kit (Catalog No. 6400211) RadioShack Pro-Line Soldering Kit (Catalog No. 6400265) RadioShack 60W Digital Soldering Station (Catalog No. 6400266) RadioShack 60W Digital Soldering Station (Catalog No. 6400053) Also fits Hakko 900M 900M ESD 907 907-ESD 933. Dimensions 1.57x0.26x0.26.