Packaging
Aside from the mouse, one finds a USB Type-A to Type-C charging cable, wireless dongle, two sets of replacement feet (fitted/dots), set of grip tape, sticker, quick start guide, and a key fob in the box.
Weight
My scale shows around 47 g (+/- 1 g), which is a bit more than the weight cited by Pwnage. For comparison, the smaller StormBreaker weighs 51 g, whereas the similarly sized, albeit fully solid Razer DeathAdder V3 Pro weighs 62 g, and the similarly sized, yet open-bottom Pulsar Xlite V3 (Size 3) weighs 59 g. An excellent weight overall.
Cable
The StormBreaker Max CF comes with a paracord-like, braided charging cable (USB Type-A to Type-C). In terms of flexibility, this one is very good, and about on par with the charging cable found on recent Endgame Gear releases. Accordingly, playing while charging is possible without feeling overly restricted. Its measured length is 1.75 m.
Feet
The feet on the StormBreaker Max CF are white-dyed pure PTFE (Teflon) feet. They are of slightly above average thickness and have slightly rounded edges. Glide is excellent. Two sets of replacement feet (fitted and dots) are included in the box.