NEF Commercial Grade Adhesive Lined Heat Shrink Tubing Kit, Waterproof Splice and Electrical Wire Protection Assortment, Automotive Marine Trailer Electrical Repairs, Made in USA NEF commercial grade heavy and thick walled adhesive lined heat shrink tubing kit, made in the USA Professional 6 inch color coded, cut to size, electrical wire waterproofing and connection strengthening Polyolefin assorted clear and colored, small and large sized sleeves with wire gauge imprinted on each tube Tubing is tinted for color-coding, but is also translucent to allow the installer to view the underlying material Great for battery splices and terminals, direct burial, underwater environments, any connection in harsh conditions