Hongkong Post has earlier introduced four types of Prepaid Postal Box / Envelope, offering customers a fast and time-saving way to post their registered airmail items. There are now more sales outlets for greater convenience, which include GPO PostShop, Tsim Sha Tsui Post Office, Cheung Sha Wan Post Office and Shek Wu Hui Post Office.
Prepaid Postal Box / Envelope can be used for sending mail item of prescribed weight (100g, 200g, 250g or 300g) by Second Class Airmail to Zone 2. Price is inclusive of postage and registration fee. If the item weighs within the prescribed weight limit, it can be posted directly over the counter. Otherwise, any shortfall in postage should be paid by stamps before posting.

Product Details
| Code | Product | Dimensions (mm) | Price (10 pieces) | Prescribed weight (g) |
|---|---|---|---|---|
| FR1F | Prepaid Postal Box | 145 x 110 x 110 | $430 | 300 |
| FR2F | Prepaid Postal Box | 220 x 135 x 50 | $390 | 250 |
| FR3F | Prepaid Postal Envelope | 140 x 150 | $240 | 100 |
| FR4F | Prepaid Postal Envelope | 160 x 210 | $340 | 200 |