Dear Anna，

Good day!

The O-rings look really good and 70SH hardness seems fine, everything seems to be fine.

we will contact you back as soon as we need more, or whenever an improovement is required.

As i told you before we are pretty satisfied with your product as well as with your responsivity and kindness.

Have a nice week

Melon Rubber&Plastic is a leading wholesale supplier o-ring factory, specializing in the manufacturing of precision o ring and industrial rubber  sealing& gasket over ten years experience; including NBR o-ring, DIN 3771 O-ring, Viton O-ring, Sealing&Gasket, bonded seals, dust cover,rubber diaphragms and other ODM&OEM rubber sealing parts order. We offers rubber molding services including: rubber compression molding, rubber transfer molding, and rubber injection molding enabling us to meet all of your product specifications depending upon our customer's requirement. we own internal tool making facility to minimize production costs and control extremely tight tolerances. We provide molded rubber product fabrication quantities from prototypes and short runs to large production runs. Even If you do not have a technical drawing, Melon Rubber&Plastic has the ability to reverse engineer your product for you directly from a sample. From simple to highly complex rubber shapes, we takes pride in our ability to consistently produce accurate molded rubber products guaranteed to meet your exact specifications and function perfectly within your application.

Below is brief O-ring Size screenshots, there are currently more than 1110 O-ring molds of different specifications, please feel free to contact us.