Sea Mail is the cheapest option for delivery of parcels within 2 to 3 months, and is available everywhere other than Zones A (New Zealand) and B (Asia Pacific).
Features and benefits include:

• The lowest cost international option for parcels   
• An ideal service for heavier items when speed is not important

Insurance
Insurance is available for articles sent using the Air Mail and Sea Mail Parcel services. Insurance cover up to $5000 can be purchased depending on the destination country and value of the articles sent.

Delivery ConfirmationDelivery Confirmation provides a proof of delivery option for standard parcel delivery services for international articles. Delivery Confirmation provides you with a card signed by the recipient of the article.  The card is signed at the time of delivery, and sent back to you, normally by Air Mail.  

Delivery confirmation is available in conjunction with insured items and articles over 2kg by Air Mail or Sea Mail to some countries. Availability varies depending on the destination.