Strong enough to take on the heavyweights in your collection!
Plain: The economical choice, ideal for seldom-used stacks.
Nonskid Foam: Economically protects shelves from scratches.
Cork: Provides abrasion protection and prevents slippage.
Rubber: Abrasion, chemical and moisture resistant for high durability and long life; provides an excellent nonskid surface.
Magnetic: Grips securely to steel shelves and booktrucks (not recommended near electromagnetic materials).