Usually, manufacturer of the product will declare the HS code.
Other than DHL and UPS, you may try FedEx and TNT Express as well.

For your reference, TNT Express rate is around RM835 for 20KG shipment, exclude import duty (if any) and GST. This is by air and delivery time is 1-3 days.

Sea freight will be much more affordable if delivery time is not a concern.
Where is your location? It will be good if you could contact the nearest freight company. Good luck.