Pre-Insulated Power Bar, IPB-S, 600 kcmil - 4 AWG Stranded Main/Run Size, 4 AWG Maximum Conductor Size, 600 kcmil Minimum Conductor Size, 3/8 in Hex Key, Aluminum, Clear, 2.8 in L x 2.38 in W x 2-3/4 in H, Conductor Entry: Single-Sided