30 Watt
Fiber laser machines are better at cutting thin metals than other types of cutting machines. A fiber laser machine is capable of cutting thin metals up to 25mm (or 1 inch). Fiber lasers then start to cut metal less efficiently. To cut ticker metals larger than 25mm or 1 in., you would require a high power laser, which will cost you a lot more.
Other engraving area options available are 6.9" x 6.9", 5.9" x 5.9", 4.3" x 4.3", and 2.6" x 2.6". You can choose them depending on your operational requirement.