3M(TM) Heat Shrinkable Cable Breakout Boot HDBB-410-1-250, black, 4-way outlet, 1 per case 3M(TM) Heat Shrinkable HDBB cable breakout boots are designed for dependable insulating and sealing of cable breakouts in multiconductor armored or sheathed cables and conduit ends. This boot comes in a quantity of 1 per case. 3M(TM) Heat Shrinkable HDBB cable breakout boots are designed for dependable insulating and sealing of cable breakouts in multiconductor armored or sheathed cables and conduit ends. HDBB boots are made from flame retardant, cross-linked polyolefin and meet material requirements of MIL-I-81765-1. The boots provide excellent electrical and mechanical protection and are supplied with an internal coating of adhesive for reliable environmental sealing.