Thank you for viewing! This is a spare spacer for the Cat Tower Stadium. Clear Bowl Hammock Cat Tower Stadium Clear Spaceship Replacement Part CAT TOWER STADIUM NL- PJE01 ADVANCED NL-PJER02/NL-FPJER03 S Class/Fabric NL-SPJ01 MINI ※From the official website※ If attaching to other cat towers, be sure to purchase the separately sold spacers as well. ※If the spacers are not used, the cat tower may wobble, potentially causing injury to your cat. This part was included with a cat tower purchased new in April 2025. I am listing it because I will not be using this part due to the location where the tower is set up.