About this 3D model

I have inspired by the design from Thingiverse here. I modify the triangle shape to a round shape. It will increase the contact area with the bag which gets a better seal results. And add a little longer item for recent usage. Now they are 50 mm, 80 mm, 120 mm, and 160 mm long, respectively.The seal result is very promising.I think it’s better than the old version. If you want to get a better seal result, choose the small printing height. I use 0.2 mm with PLA. Detail information on Youtube:https://youtu.be/lkQJ6n5CDvs