The Caster Wheel adds a swivel point to your Motorized PASCO Structures and is utilized in the StructureBot kit.
ME-7023 Caster Wheel
www.pasco.com/products/lab-apparatus/structures/motorized-structures/me-7023
ME-7029 StructureBOT
www.pasco.com/products/lab-apparatus/structures/motorized-structures/me-7029