BB-UN300 Square Type Bottom Bracket Softball Bats Size: 18 x 11 x

Size: 18 x 11 x 8

Fully adjustable belt eliminates bouncing or shifting

You get virtually hundreds of resistance-exercise options

Dimensions: 1

BB-UN300 Square Type Bottom Bracket Softball Bats Size: 18 x 11 xThe Shimano BB UN300 Bottom Bracket is a quality square type bottom bracket for your standard chainset. Get improved durability and a smooth ride. Cartridge bearing square bottom bracket MTB standard structure Better chain line stability with chain line stabilizer Tourney A070 Series Shimano high quality performance Adapter material: Aluminum Bottom Bracket Shell I. D.: 1. 37 Threaded BB shell width: 68mm BB Frame Interface: English