Preformed Line Products 8006318 BLACK-JACK™ 25-Pair Closures 25-Pair Butt 12"L x 3.5"W x 3"H .Effectively Protects Cable - THE BLACK-JACK 25-Pair and BLACK-JACK™ Plus 50-Pair Closures are filled with POLY-BEE™ Sealant to provide longterm protection for direct buried