Sealey heavy duty booster cables 600a 800a sealey bc4050hd p a heavy duty booster cable from sealey designed with a pvc sheathed copper covered aluminium cable for minimum heating and maximum power transfer resistant to grease oil and most acids heavy duty clamps fitted with heavy insulating sleeves and strong clamp spring suitable for cars light commercial hgv psv marine and agricultural applications supplied in tough storage case with operating guidelines p sealey bc4050hd hea