1. Ordinary parcel: Ordinary parcel is the cheapest choice for mailing heavy objects. Among them, the first charge in Hubei Province is 8 yuan/Jin, and the second is 3 yuan/Jin; 8 yuan/Jin is charged for the first time outside the province, and then 3 yuan/Jin.

2. Shentong, Dayun and ZTO Express: These express delivery companies are the first in most parts of the country, and the first one charges 12- 15 yuan/kg; Continued weight 6-8 yuan/kg.

But for your 20 kg dumbbell, it may involve higher freight because it exceeds the first weight category. Here, we provide a cost estimate for reference only:

* Ordinary postal parcels: If ordinary postal parcels are used, the freight that may need to be paid is probably the first weight fee (assuming 8 yuan/kg)+16 kg of continuous weight fee (assuming 3 yuan/kg), which means that the total is * * * about 48 yuan.

* Shentong, Dayun and ZTO express delivery: If Shentong, Dayun and ZTO express delivery are used, assuming that the first weight is 15 yuan/kg and the second weight is 8 yuan/kg, then the freight you may need to pay is probably/kloc of the first weight cost (15 yuan/kg)+the second weight cost (8 yuan/kg).

However, the specific freight rate may change according to the actual transportation situation. In addition, both freight estimates are based on the price during non-express peak hours. During the peak period of express delivery, the freight may be adjusted due to the increase of transportation pressure and demand.

Please note that the above freight estimates are for reference only, and the actual freight may change due to factors such as region and time. It is suggested that when choosing a courier or logistics company, you can check the official websites of each company or consult the local courier service point to get the latest cost information and help. At the same time, considering the particularity of dumbbells, it is suggested to choose appropriate protective measures during transportation to ensure the goods arrive at their destination safely.