Dualtron QR Latches (6mm). These are the quick latches for the seat kit and folding bars. 

Also compatible with a range of scooter models and brands, including Mantis 10, Mantis 8, Wolf X. 

Please note that despite this part being compatible with the above models, MinimotorsUSA does not sell or service these particular brands or models, and we are not affiliated with them in any way.