Heat Shrink Wire Kit for airport lighting. Made by Crouse Hinds and designed to seal the cables going to the marker lights on the airfield. Could be used in other wiring applications Crouse Hinds PN# HSK-A1 or 10047-1425 Orginally used by expeditionary forces to setup airfields and their new bases. Fresh from surplus. The Airport Lighting Heat Shrink Kit features a mechanically tough polyolefin heat shrinkable sleeve. The sleeve is designed so that one diameter will fit all common L-823 connector/cable combinations, including cables as small as 0.360 inch diameter. The one-piece HSK sleeve is factory coated with a waterproof sealant at the ends only, leaving the L-823 connector clean and re-enterable. The main purpose is to seal the L-823 connector/cable joint, not to seal the plug/receptacle mating. The two-piece HSK has sealant the full length. The cross-linked polyolefin sleeve provides excellent moisture, oil and fuel protection for L-823 connectors used in L-868 and L-867 bases, or direct buried. The sleeves are tough and withstand direct burial abuse. Save $$$ here on this item as these normally go for about $143 at the dealer High quality OEM part R2A10 13030