Extra-soft performance rubber (TPE) caster wheels offer the ultimate in smooth, quiet mobility. Longer wearing than TPR and rubber-on-iron, the grippy tread also delivers ergonomic advantages with easy rolling and superior shock absorption. TPE resists chemicals and moisture, and it rejects debris— even metal shavings. The rigid construction of the caster rig ensures steadiness in straight-line transport and stability when used in conjunction with swivel casters for applications where some turning is needed.