This is a large shot firework so although it's technically under 500g /a garden firework, with the size of the burst it would be advisable to fire this further back, or at least make sure there is good space all around the firework not 10/12 narrow meters. It's nice not to get hung up on the tech specs but in the case of the larger fireworks safety comes into it. That being said its very well built being Jonathan's and he's done a good job making fireworks to be proud of fir a reasonable price. Unheard of just a few years back Jonathan's fireworks are now a well loved brand in the community and being UK based its nice jordans are supporting them