We all know vacuum cups have a lot of makers to do it. Especially for brand Yushin, Star, Harmo robotic use and they also provide it but their price is too high. And we have another choice we can use ACY vacuum cups instead due to their vacuum cups are fully compatible with Yushin, Star, Harmo. Of course, their quality is very good and it can compare with brand PIAB and etc. Their website is "www.acy.com.tw"