• NEW, Mint Shimano MTB/Road BB-UN53 73x118MM English-Thread Cartridge Sealed Bearing Bottom Bracket. New In Box. 
• Square taper axle.
• English threads, fits 73mm bb shells, MTB/Road cranks and has a 118mm axle.
• Ready to install.
• Made in Japan quality from 1990.
• 10.8oz./307 grams.
• BB840.