Instead of having an O shape it now has an X shape. This means that when pressed between the chain plates, it no longer has a flattened O ring shape but instead has two smaller faces touching either plate in an X shape. This gives you the same great sealing and durability but now with very low friction.
Graduation Announcement Etiquette: How to Address Graduation Announcements. College Graduation Announcement Etiquette: How To Address Graduation Announcements With Inner Envelopes. You can either address your envelopes by hand or order printed envelopes while purchasing your college graduation announcements. The later will save you time and effort.
College graduation invitations or graduation party invitations are great for not only a party, but also an invitation to the graduation ceremony. Show your graduate the love with all the right stationery to match the invitations and announcements. Announcement cards are no longer stuffy, they are personal.