Based on our own experience with Schioppa GLEEF 412 UPE Polyurethane casters, we can confidently say that these are the best in the market. These casters are durable and long-lasting, making them ideal for any industrial or scientific use .The polyurethane material ensures smooth and quiet movement while also protecting floors from damage. THESE casters are also easy to install and have a high load capacity. The only downside we found is that they are slightly pricier than other options on the market. Despite this we highly recommend these casters for any material handling product needs..