If some resources used in the production of a good are only available in limited quantities, then the long run market supply curve will be perfectly elastic.

Long Run Market Supply Curve

A curve showing the relationship between the price of a good and its supply over a longer period, when all input factors can be varied.

Limited Quantities

A restricted amount of a product or resource available for consumption or use.

Perfectly Elastic

Perfectly elastic describes a situation in market demand where consumers will only buy at one price and any deviation from this price leads to zero demand for the good or service.