Thank you for viewing! This product is a fully waterproof firecracker case, made as a single unit. It has no wasted space and a practical, cool design. I came up with the idea because I personally felt it was a waste of time to take firecrackers out of a separate case when I wanted to get to the fishing spot quickly. Since the whole thing is waterproof, the firecrackers won't get wet even if they're submerged in water! This product is a tool for setting off firecrackers to avoid encounters with wild animals such as bears and wild boars when fishing in mountain streams, hiking, gathering wild plants, harvesting bamboo shoots, camping, etc. You can use the firecrackers one by one, accurately in the direction you want to set them off. Detailed usage instructions can be found on video-sharing sites. The whole thing is very water-resistant. The barrel is made of stainless steel, so it's rust-resistant. The cross-section was polished with a fine file using a lathe. It's smooth. The main body is painted with two-part urethane. It has a very strong gloss and is also very water-resistant. Since two-part urethane is used, you can wipe it clean with chemicals such as alcohol if it gets dirty. Epoxy is used for the adhesive. Details: Body material: Japanese magnolia (Hou) Barrel: Diameter 16mm, depth approximately 67mm, all stainless steel pipe Adhesive: Epoxy Firecracker case: Aluminum (fully waterproof) Ring part: Iron Coating: Two-part urethane coat The diameter and overall length of the body are listed in the tag. The overall length does not include the ring. As this is a handmade product, there may be minor scratches, measurement errors, and slight unevenness on the painted surface. Please understand this in advance. Firecrackers are not included, so please prepare your own. Please use at your own risk. If you have any questions, please feel free to contact me in the comments section. Thank you very much. Japanese magnolia, Hou, Hou-no-ki, domestic wood, mountain stream fishing, wild plant gathering, bear repellent goods, bear scarer, bear deterrent, bear avoidance, bear countermeasures, fine wood, outdoor, hiking, camping