Birzman Tubeless Repair Kit - road.cc

A tubeless puncture repair kit in the shape of a CO2 cartridge (including threads) with enhanced portability.
The contents include an insertion tool and a cleaning file hybrid, plus 5 pcs x 2 sets of Ø3.5 x 50mm tire plugs.

Road.cc says of the kit: "a handy, simple-to-use option for plugging a tubeless tyre puncture when you're out on a ride and your sealant doesn't do the job. It's made in the shape of a 16g CO2 cartridge so can be stored easily anywhere you'd usually carry one of those."