Here are the three types of rubber Jordie looks at in this video:
Wagtail Rubber: https://shopwindowcleaningresource.com/wagtail-3-meter-squeegee-rubber.html
Pulex Hard Rubber: https://shopwindowcleaningresource.com/pulex-hard-rubber-12-pack.html
Professional Hard Rubber: https://shopwindowcleaningresource.com/professional-squeegee-hard-rubber-12-pack.html