These are the cutoff sections that are left when making 37mm smoke and 37mm bird banger tubes. The length of the 37mm tubes vary but they are all longer than bird banger tubes but smaller than smoke tubes, typically right between the two in size. The box quantity varies from 100 per a box to 140 depending on the tube lengths. These wholesale boxes are typically only available to employees and family but due to the volume of kits being produced we have a surplus. Only available for a short time while supply lasts. We have only a few of these available. No discs or fuse included