Explanatory notes
… any insulating material, usually very hard and non‑porous, e.g., ceramic material (porcelain, steatite), glass, fused … insulating materials. They may contain fixing devices (e.g., metal brackets, screws, bolts, clips, laces, slings, … ( heading 85.35 ). Insulators are used on outdoor cables, e.g., in telecommunications, power networks, electrical …