Pontoon Storage Blocks, Unique Design - Securely Stack on Cinder Blocks, UV Resistant and Extremely Durable Polyethylene, Perfect for Winter Storage, Made in USA4 Pontoon Stands Included in Every Purchase, New Design pontoon storage blocks. Sit on top of cinder block PERFECT FOR PONTOON STORAGE: These amazing blocks are the easy and secure way to store your pontoon boat or Jet Ski when not in use. They keep your investment from resting directly on the ground and also allow easy maintenance to the boat or to your trailer UNIQUE DESIGN: These pontoon stands feature a clever design that allows you to use them as