Shimano 6/7V Speed Bicycle Freewheel Tz500-7 Flywheel Mountain Bike Cassette Metal Thread Sprocket 14-28/34t Shimano Bike Pars - China Shimano Bike Parts, Freewheel | Made-in-China.com
Shimano 7 Speed Freewheel / Cassette MF-TZ500-7 14 / 28 Index - Screw On | eBay