These Ohlins air spring volume spacer kits enable riders to precisely tailor the ride characteristics of the air spring on their Ohlins rear shock by clipping larger or smaller volume spacers onto the shaft within the end eye/air can cavity.This air spring volume kit enables riders to precisely tailor the ride characteristics of the air spring of the Ohlins TTX Air 1/2 m.1 rear shocks by clipping larger or smaller volume spacers onto the shaft within the end eye/air can cavityIncludes (8) spacers: (4) 2000 mm sleeve spacers, (1) 4000 mm "puck" style spacer, (1) 6000 mm "puck" style spacer, (1) 6000 mm "puck" style spacer, (1) 12,000 mm "puck" style spacerSleeve style spacers only work on the double can TTX2 AirConsult TTX Air Owner s Manual for detailed instructions and descriptions Ohlins Rear Shock Air Spring Volume Spacer Rear Shock Tune Kits UPC: 840153640520