PART NO. DESCRIPTION 034-261-07 20/24 Air Chamber for 12K Dexter GC2430L 24/30 Air Chamber for 12K Dexter MA3030 30/30 Air Chamber for 25K Dexter EXGLG4536UB 12-1/4" X 5-1/2" (10K-16K) Shoe - Hayes/Alko/Dana/Meritor  EXGLG4692U 12-1/4" X 7-1/2" (25K) - "Q" Style Shoe - Dana/Meritor EXGNN4515QB 16-1/2" X 7" (25K) - "Q" Style Shoe - Dana/Meritor GC2424L 24/24 Air Chamber for 12-1/4" X 7-1/2" (25K) - Dana/Meritor MA3030 30/30 Air Chamber BR HWD KIT TAND Air Line Kit for Tandem Axle Air Brake Trailer BR HWD KIT TRIP Air Line Kit for Triple Axle Air Brake Trailer