What is the gauge of the wire, and how much weight will the shelves support?

The gauge of the wire is 2.8mm and the weight per shelf is 10lbs. 

What is the weight capacity of the shelves

The weight capacity per shelf is 10 lbs

Is there any way to buy the pieces that connect the poles?

Certainly. Below is a link to the page on our website where you can purchase the additional clips.

Hope you are enjoying your closet organizer.

Let us know if there is anything else we can do.

https://honeycando.com/collections/shelving-components/products/4-pack-shelving-unit-clips