Work as intended. The quality of the bearing is satisfactory. There is no loud noises coming from the wheel in operation. The machining of the metal is good enough. The rubber is uniformly black without signs of discoloration. It is also firm enough and elastic enough. The wheel fits well on the aluminium extruder strut I placed it on.

Nov 18,2019

Overall satisfied with the product. Because some of my wheels weren't rolling smooth and these were a perfect replacement. The reason I'm only giving these 4 stars is because a couple of them didn't roll smooth enough for me to use on a high precision 3D printer.

Apr 01,2019

My old wheels were worn down and causing the bed to stick and prints to have all sorts of problems. These replacement alfawise idler whee were the perfect match. They have smooth bearings and the feels stronger. So far I'm very happy with them.

Mar 17,2019

Good quality sealed ball bearings, high density rubber and metal wheels are wearing better than expected on the extruded aluminum rails.

Apr 05,2019

These wheels have 2 bearings each and roll smoothly. These wheels are a great deal and I will be ordering more for my 3d printers.

Jan 05,2019

En prevision du remplacement des roulements de mon alfawise u20 qui un jour ou l'autre devront être remplacés.
Doit exister sous une autre dénomination un peu moins cher.
j'ai commandé des roulements 625ZZ qui semblent être les mêmes

Apr 07,2019

This is an exact OEM part replacement for the pulley wheels. It even has the same numbers on the stamped part.

Jun 13,2019

achat de pièce détachée au cas ou , pas eu l'occasion de m'en servir , la livraison a été rapide , bien emballé

Dec 10,2019

Put these bad boys on my printer, perfect fit and the bed moves smoother now than when it was new

Feb 23,2019

I'm happy with these wheels and I'm glad they work well. This was a good purchase.

Mar 26,2019