Echo rear fixed hub, for 32 spokes, sealed bearings, 116mm spacing old (you can mount on 120mm o.l.d.), alum body, 10mm steel axle, with bolts and tensioners,  with 15 teeth cog (or 12t, let me know which cog you want; i have lots of cogs if you will need them in the future). 

Anodized in green, silver, blue, gold, red (let me know which you want).