The Discoverer PQ Plastic Core Box is built with safety and ease of handling in mind. Built to withstand the rigors of all extreme weather conditions, these completely plastic core boxes are engineered to sit exposed for over 50 years to the elements out in the field. Empty, the Discoverer Plastic Core Boxes nest inside of each other: 10 rows of boxes reduce down to just 18". Filled with core, they are 29" high. Accessories available are Aluminum ID Tags, Core Markers, Lids and Clips, and Locking Links.