ARB 4X4 Accessories Nissan C200K Air Locking Differential, Rear 31 Spline RD196 For Use With 31 Spline Axles;For Use With All Ratios;Air Activated Selectable Locker; Converts From Open Differential To fully Locked Or Spool; Simple Push Button Operation; Requires Air Compressor Sold Separately ARB 4x4 Accessories ARB Nissan C200K Air Locker Differential - RD196 RD196 Differentials