Boshart Industries heavy duty heat shrink kit series are make of flexible cross-linked polyolefin heat shrinkable tubing. This tubing is suitable for applications up to 600 V providing excellent waterproof insulating and environmental sealing protection for splices, connections and jacket repairs. The high impact and abrasion resistance of this heavy wall tubing provides the highest level of mechanical durability. When heated above 120 deg C (250 deg F) there is a 3:1 shrink ratio. Boshart Industries Heat Shrink Splice Kit, Lead-Free Heavy Duty, Series: HS Series, Specifications: 14 to 10 AWG Wire, 3 in Tube Length, 0.15 in Recovered ID, 0.4 in Expanded ID, 8 Piece, Black, 6.1 in L x 4.95 in W x 0.85 in H Dimensions