Park Tool 788 Reamer: 43.95mm

Reams head tube I.D. to 43.95mm to accept "internal" headset cups with 44.05 - 44.10mm O.D. (1-1/8 ZS standard) Use the 788 with the 690-XL Facing Cutter and 750 Centering Cone For upper or lower headtubes that accept the ZS44 or EC44 headsets to 43 95mm to accept "internal" headset cups with 44You may also like Ball Pit Balls 500 Count for Kids, Colorful Phthalate Free BPA Free Baby Toddler Play Balls for Kids Toddlers - Safe, Crushproof, Lightweight, Durable Spheres-Purple.