8’x4′ TigerFlex Shiplap Pent Secure Storage Unit. The TigerFlex® Shiplap Pent Secure Storage Unit is a robust structure crafted to provide reliability, durability, and protection. Featuring safeguarded apertures and a COMPLIMENTARY secure steel reinforcement rod to fortify the entrance bolt, you can also customize the glass panels and entrance into the most fortified configuration – ensuring your TigerFlex® becomes more of a TigerStronghold! 8’x4′ TigerFlex Shiplap Pent Secure Storage Unit