hat
Yon koule (oswa castor) se yon volan anriven, sèl, doub, oswa konpoze ki fèt pou monte anba nan yon objè ki pi gwo ("veyikil la") pou pèmèt ke objè yo dwe fasil deplase. Yo disponib nan diferan gwosè, epi yo souvan te fè nan nylon.Diameter se 22-27mm.Fè ak epesè vè 4-6mm.
eng
A caster (or castor) is an undriven, single, double, or compound wheel that is designed to be mounted to the bottom of a larger object (the "vehicle") so as to enable that object to be easily moved. They are available in various sizes, and are commonly made of nylon.Diameter is 22-27mm.Fit with glass thickness 4-6mm.