0.5 in. Hex Aluminum Spacer Stock - AndyMark, Inc

Tube Roller - AndyMark, Inc

0.500 in. ID 0.768 in. OD 0.063 in. Long Hex Spacer [Qty-10] - AndyMark, Inc

2 Compliant Wheel, 1/2 inch Hex, 60 Durometer Black Studica Canada - Robotics, Automation Technology for Education and Industry

2 Compliant Wheel, 1/2 inch Hex, 40 Durometer Orange Studica Canada - Robotics, Automation Technology for Education and Industry

Sushi Roller Assortment Kit - RobotShop

INFINITE RECHARGE

0.5 in. 7075 Aluminum Hex Shaft Stock - AndyMark, Inc

0.500 in. ID 1.125 in. OD 0.570 in. Long Polypropylene Hex Bore Spacer - AndyMark, Inc

Tube Roller - AndyMark, Inc

35 Sprockets (20 Options) - VEX Robotics