These are HUGE. Not anything like the little poppers you see advertised here and there.. These targets can be heard eight miles away. Sold in two component so they are 100% legal to purchase in any state. Once mixed, they must be used "on site" in order to comply with all CFR's (storage laws) Must be over 21 with clean criminal record to use. Case of 20 6" cylinder targets for $100. Best money ever spent. All major credit cards accepted. Call Daniel/Skylight Company at 541-744-1406 for orders/info.