The FAO Schwartz Build-a-Coaster 736 Pc Set Replacement Parts Bag 8 is a bag of replacement parts from the Build-a-Coaster Set.  The contents of the bag are listed in the instuction manual and are:  4 - Rod K, 2- Circle Connector T, 1 - Connector R, 1 lg Connector Q, 2 Retaining Clip P, 3 - End Clip U, 4 -  Conveyor Chain Gears L, 1 - End Cap M, 24 -  Cylinder N, 10 - Cylinder O. This particular STEM Building set was retired in 2022, making replacement parts hard to find.   This Bag 8 contains everything the FAO Schwartz Build-a-Coaster Building Set Original Bag 8 contained.  IT IS A COMPLETE BAG 8 OF REPLACEMENT PARTS.