IKEA EKOLN/TRONNAN Replacement Rod

Replacement rod to combine the IKEA TRONNAN with EKOLN toilet brush:

• https://www.ikea.com/us/en/p/ekoln-toilet-brush-beige-90493007/ 
• https://www.ikea.com/us/en/p/tronnan-replacement-brush-white-10457027/ 

The replacement brush is a two pack but only comes with one rod. I should've bought two…