Dahon FSA Vero Double Chainset Compact Square Taper. (Suits Dahon Smoothhound) • A6061-T6 cold forged solid crank arms • Compatible with JIS square taper BB • AL7075 T6 stamped chainring CNC finished • SIZE • Length: 170 mm • BCD 110mm • Teeth Combination: 55/44 FINISH • Polished Silver crank arm • Silver anodized outer chainring with Silver details.