SHINee‘s standing mic dance for “Dream Girl” has been a hot issue, and the boys have already announced that one mic weighs in at 4 kgs (8.8 lbs). But do you know how expensive the mics are?

The mics aren’t ordinary mics – they’re built from a material used to build airplanes to make sure they’re as sturdy and light as possible. SM Entertainment revealed, “The mics that SHINee use are specially made from the same material as airplanes. Each one costs 1,500,000 KRW (approximately 1,380 USD). They’re used for both practice and on stage, so we have 5 extra for a total of 10.”

Even airplane material might not be strong enough though because one broke on stage already.