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The Moroso spark plug shrink sleeves are blue heat-shrink pieces sold in an 18-pack for insulating and labeling ignition wires. The sleeves protect wire terminations and can be applied to preserve routing clarity or improve corrosion resistance at connections once shrunk. The multi-pack offers enough pieces for several wires or for replacement during tune-up and harness work.
Moroso Spark Plug Shrink Sleeves - Blue - 18 Pack
