Tired of using wimpy speaker box terminals? Well we have your answer. Milled from 3/4" Expanded PVC, This light weight yet high strength material will not break or leak under the most grueling box pressure. Using all Aluminum hardware, they will last a life time and can be moved from box to box when you decide to upgrade! 3/4" PVC Material All Stainless Steel Hardware (28 pieces) 5/16" Bolt Terminal Made in USA!