MARINE GRADETM ADHESIVE LINED HEAT SHRINK TUBING insulates and protects connections from mechanical abuse, wire pullout and abrasion. Heat activated adhesive melts and flows under pressure from shrinking to create a seal which resists salt water, salt, oil, gasoline, and other contaminants. Size: 3/8 in. x 3 in. Color: Black/Red Qty: 1/1