In order to sync product to 11 street, bundle shipping fee is required to set.
1. Login to 11 street seller account.
2. Select seller office
3. Go to Member Management > Seller Details
4. Looking for *Ship-From address > Click "Manage"
5. After click "Manage", will pop up a "Ship-From Address" window. You may scroll down and checked "Set Bundle Shipping Rates" and filled in the relevant fields will do.
Attached is the GIF image for extra reference:-