According to my experience these double shielded flanged bearings are highly reliable and durable .They have smooth operation and provide excellent support for my printer. The zinc-coated flanges also protect against corrosion, making them ideal for long-term use. However, they are slightly more expensive than other bearings on the market, but the quality is worth the price. Overall, I highly recommend these bearings for anyone in need of a dependable and sturdy option..