The DG (Dangerous Goods) fee is charged any time chemical based electropolisher fluid is shipped via a road carrier. It is a one off handling fee of $49 charged by the carrier on top of the standard road freight fee. This fee covers the cost of the additional requirement a road carrier has to ensure safe transport of dangerous goods. The DG fee is charged only once per shipment.
You can avoid this fee by choosing the water based or pH neutral electropolisher fluids instead of the EKP-50 range