I'd never seen a striped bell pepper before today! They are so beautiful. The pictures just don't do them justice! These are marketed as "Aloha" peppers and are also called Enjoya, but are actually Holland Peppers. I was wanting to save the seeds and grow some next year, but they'll only produce solid color yellow-orange fruit. 😭
These were originally a naturally occuring mutation, but to reproduce them to have the stripes, they have to be propagated and grafted by hand. So if you see these seeds for sale, don't be fooled into buying them! You will not get these beautiful stripes you see here! ❤️ 
