SWS provides curbside residents with 95 or 96 gallon large, plastic rollout carts for refuse & recyclable materials collection services. The color of the carts differ by service type and contain permanent City of Charlotte logos and messaging. Each cart has a unique serial number and embedded RFID technology. Throughout the fiscal year, SWS purchases batches of these carts to be issued as replacements, second cart purchases and for new builds. The current estimated annual quantity of carts is 10,000-12,000 carts total. The annual quantity manufactured and purchased may increase or decrease depending on service demand or type, unit growth rate and age of existing cart population over time.