If you are a hardcore VEX builder, this is the kit you're going to want. The VEX Booster Kit contains over 600 pieces of VEX Structual and Motion Components. Use the parts in the Booster Kit with the Protobot Robot Kit to build bigger and better robots. This kit includes pieces specifically recommended by VEX builders to maximize versatility.

                                                                                                                                       

Kit contents
Steel Chassis	Collars, Shafts, and Bearings
(2) Chassis Bumper 2x2x25 holes	(16) Shaft Collar
(4) Chassis Rail 2x1x25 holes	(4) Shaft 11mm
	(4) Shaft 2in.
Steel Plates and Bars	(4) Shaft 3in.
(2) Plate 5x5 holes	(2) Shaft 4in.
(2) Plate 5x15 holes	(4) Shaft 12in.
(2) Plate 5x25 holes	(26) Bearing Flat
(8) Bar 1x25 holes	(6) Bearing Pillow Block
	(4) Lock Plate, Plastic
Steel Angles
(2) Angle, Slotted 30 holes	Standoffs and Spacers
(2) Angle, Slotted 30 holes Inverse	(10) Standoff 1/2in.
(2) Angle, Segmented 25 holes	(8) Standoff 1in.
	(4) Standoff 2in.
Steel C-Channels	(4) Standoff 3in.
(2) C-Channel 1x2x1x15 holes	(20) Shaft Spacer, Thin 4.6mm
(2) C-Channel 1x2x1x25 holes	(20) Shaft Spacer, Thick 8mm
(2) C-Channel 1x5x1x25 holes
Steel Gussets	Screws, Nuts, and Washers
(4) Gusset, Pivot	(70) Screw 8-32 x 1/4in.
(4) Gusset, Angle	(28) Screw 8-32 x 3/8in.
(4) Gueest, Plus	(28) Screw 8-32 x 1/2in.
	(14) Screw 8-32 x 3/4in.
Gears, Rollers, and Clutches	(10) Screw 6-32 x 1/4in.
(4) Intake Roller	(10) Screw 6-32 x 1/2in.
(4) Gear 12-tooth	(30) Washer, Steel
(4) Gear 36-tooth	(10) Washer, Plastic
(4) Gear 60-tooth	(130) Nut, Keps 8-32
(2) Gear 84-tooth	(28) Nut, Nylock 8-32
(4) Gear Rack, 19-tooth	(50) Bearing Pop-Rivet
(3) Motor Clutch