Hi, we received E-mail C Frantz who you contact to request test sets, glass Corundum9H. Packaging 50ml 3-year durability.If you're able to see a test Corundum9Hhttps://www.youtube.com/channel/UCWBVtn4B68GMlkst1BRASsQ
Hello Frantz C we receive E-mail to your contact. For coating glass test Corundum9H size 50ml sturdy 3 years can test the solution Corundum9H Https://www.youtube.com/channel/UCWBVtn4B68GMlkst1BRASsQ.