The Tubi Cartridge MT25 Storage Box by Topeak is a compact and convenient MTB tubeless tire repair kit. It features a CO2 cartridge style pod that can be used on its own for tire repairs or in conjunction with a CO2 inflator for tire inflation.The kit includes a 2-in-1 tire reamer and 3.5mm plug insertion tool, as well as 5 pieces of 3.5mm x 50mm tire repair plugs. These tools are made from CNC aluminium and stainless steel for durability.The Tubi Cartridge MT25 Storage Box is compatible with the TubiMaster GXT Bolt-on and also includes a repair plug compartment for added convenience. It measures 10.5 x 2.6 x 2.6 cm (4.1"" x 1."" x 1"") and weighs 53.8 g (1.90 oz).This tire repair kit is a must-have for any mountain bike enthusiast looking for a compact and reliable solution for emergency tire repairs on the go.