Xiaomi M365 and copies that adopt the smaller size brake pad with a tail (such as 1S and Pro). The easy way to determine if you have smaller size is to note the presence of a tail (notch), as the larger size Round 21.6mm pad has no tail.
BRK-720 series callipers which accommodates 18.5mm pads on early (typically pre-2024) models of Dragon GT, GTR & GTS(including V2). The newer (2024 onwards) Dragon G series callipers require a larger Round Slotted 2.5mm pad.
Also suits post-early 2024 VSETT 9/9+. Later models require Round Tail 21.5mm pad (see notes below).
Dimensions:
Supplied as a set (pair) two pads, one for each side. Order two sets for both front and rear.
Available in three compounds. To further understand merits of each compound, refer to the Brake Pads Category homepage.
Notes:
For VSETT 9/9+ models The length of the tail (notch) can assist determine appropriate pad. This Round Tail 18.5mm generally suitable for post-early 2024 models, it has a larger tail. The shorter tail Round Tail 21.5mm pad generally suits models prior to early 2024 (the pad on the earlier callipers being larger). Image below courtesy MACURY Store contrasts the pads for the old (21.5mm shown as 21.25mm) vs new (18.5mm shown as 18.51mm) size calliper. Do not use listings from Ride Electric or VSETT Australia as they are ambiguous., (pre-early 2024) calliper. You can also use the number of indentations on the back of the plate, this Round Tail 18.5mm has 4 indentations. Round Tail 21.5mm pad has two. Best to check/measure your calliper (not existing pad - as the one fitted may be incorrect).
Callipers typically have a small round magnet to secure the pad, such as those observed in M365 models.
Images below from the Dragon Scooters Disc Brake Pads video showing early model (2022) GT brake pad replacement on BRK-720 calliper with these 18.5mm pads.