MEGNEG Air-Can Upgrade Kit for RS Deluxe & Super Deluxe shocks.
Fits 225 x 67.5-75 mm shocks and 250 x 67.5-75 mm shocks.
Extra negative volume makes the shock softer off the top.

SRAM Part Code:  00.4318.028.002

Ordered in from supplier upon customer order.  Usually available approx 2-3 days lead-time.