1kg box fell on my iphone 7

Can someone kind enough to tell me roughly how much weight drop can an iphone 7 withstand. Yesterday morning I accidentally dropped a box on my phone, quite a heavy one, I estimated it to weigh around 1kg more or else. The display seems working well, there is no damage on the surface, but I'm concerned if the phone has some internal damage because it was quite a big loud drop onto my phone. I'm worried if my screen will be bent or something because the box fell on the lower part of my phone. Can someone advise me whether I should visit an Apple Service Centre because the phone is only 2 weeks old and I don't want to risk dismantling the phone.