Kupo 8″ Pneumatic Wheel with Square Speed Adapter (Set of 3)
[REF]:
https://www.bhphotovideo.com/c/product/1692111-REG/kupo_ks941412_8_pneumatic_wheel_set.html?gad_campaignid=21973659102&gad_source=1&gbraid=0AAAAAD7yMh1ofvGO64pl5NkYWF9hJC-en
The set of three Kupo 8″ Pneumatic Wheel with Square Speed Adapter fits light stands with a 0.98″ diameter. Each wheel is braked so it stays put once positioned.