Marushin X Cartridge For Marushin Gas Revolvers (6pcs Set)
(40.5×10mm (17G) 6MM BB Bullet)
 
Cartridge Type:  Marushin X Cartridge For Marushin M10/M36/M60...etc Gas Revolvers
Above is the sample photos from Marushin, the actual product's outlook may get some difference comparing with above photos