New items

- Soft noiseless motion, outer layer is made of high quality PU.
- Castors are made of good quality plastic material.
- Castors don't have odour.
- Castors don't leave "black lines' on floor when used.
- Castors don't deformed under the standard load.
- Packed 4 pcs in a polybag.

PU - is bright, with smooth surface and good resistance, more expensive, better quality.
PVC - softer material, surface is matte, price is lower.

Buffer layer must not be very soft, it must resist the pressure. In fact, if it looks like a rubber and is very soft, this quality is low, it doesn't have enough resist and will wear out very quick.