Hysplice, 250 (7, 19, 37) Str. , 7-1/2 in L, Full Tension Sleeve for All Aluminum Compressed and Compact Conductors.Features: Made Of Pure Copper Tubing, Designed To Develop The Full Rated Breaking Strength Of Hard Drawn Or Medium Hard Drawn Copper Conductor, Installed With Standard Tooling, Tools, Die Set Catalog Number, And (number Of Crimps): Y35, Y750 Tool, U169 Die, (9), Y45 Tool, U169 Die With PT-6515 Adapter, (9), Y46 Tool, U169 Die With PUADP-1 Adapter, (9), Y48B Tool, C169 Die, (3), Y60BHU Tool, L169 Die, (3), Die Index: 169 Element A, Conductor Type: Stranded Copper