Today , through extensive research and development, Jimmy Wink has developed the next generation of half round and square dump trailers. This new concept is unique because it combines two proven materials, aluminum and plastic.This new composite design has taken an additional 1,000 pounds out of the lightest half round and/or square dump trailer currently being built and sold by allowing the plastic to take the place of aluminum sheet and redesigning the aluminum extrusions to provide all the necessary strength. This concept is going to revolutionize this industry, having the same impact as aluminum did when it replaced the traditional steel trailers. This composite design has several advantages in addition to the lighter empty weight. This unique design will help reduce the cost of operation such as insurance cost (because it will cost less to repair), replacement cost to replace the wear part (liner), fuel efficiency and durability.