Identiv 4001 credentials are made with layers of PVC. The Identiv 4001 proximity card is a clamshell style card with vertical slot punch and is NOT directly printable with any ID card printer. Adhesive backed PVC cards may be used to print with and then stuck onto the Identiv 4001 clamshell card after.
The Identiv 4001 credential can only be programmed with 26 Bits only. If you are looking for a different format with more than 26 bits try the Identiv 4000.
Identiv Proximity Card Programming Guide