(Category:Manufacturing - Trailers) Manufacturer and supplier of durable trailers in Nelspruit, Mpumalanga. Sleepwa Koning, also known as Trailer King, is based in Mbombela (Nelspruit), Mpumalanga. The company manufactures, sells, and services high-quality trailers, including heavy-duty and custom designs for agriculture, construction, and logistics. Known for durability and after-sales support, Trailer King has become a trusted name in trailer solutions.