IRD Cyclone Mark1  7 speed freewheel. 13-32 Tooth.

-Special teeth profiles
-Fully chrome-plated cogs
-Heat-treated for durability
-Alloy and polycarbonate glass fiber spacers
-Double row precision bearings
-Labyrinth seals
-Standard ISO 1.375 x 24 TPI. 
-Sample weights: 5sp/13-32t: 400g 6sp/13-28t: 440g 7sp/13-24t:399g
-Uses Shimano Type Freewheel Remover