The little star flower gear knob is our regular product, so we can send you some free samples if you need to check our quality. You only need to bear the shipping cost. It’s only a tiny parcel and will not cost too much.
All of our resin balls can meet the standard of America and Europe. They can pass most tests, such as CE, RoHS, CA Prop 65.
As a factory since 2002, we can have some cases for your reference and hope they can do some help.
(1) Some customers know their thread standard, so we only need to send them one adapter. In this way, customers can save some costs.