The blades are only held in place by a rubber gasket that has a loose fit when the assembly isn't attached to one of the jars. It has a plastic tab that feels like it may break if you put pressure on it. Also, the blade assembly feels loose and is not very well-made. This design can wear the gears out more quickly because it causes more friction as they slip against each other. Since the parts don't fit together perfectly, it's harder to place the jar on the motor base. The gear on the motor base is square-shaped but fits into a star-shaped gear on the jar. However, the design of the gears and blade assembly may not be very durable. The plastic personal jar also feels decently well-built and has a resealable lid. The main jar is made of thick glass and has a sturdy-feeling handle. The buttons on the front of the motor base are clicky and easy to use, and the motor base has vents to allow heat to escape. This blender has a mediocre build quality. Oster Pro 1200 Blender with Professional Tritan Jar Nameġx 24-ounce jar, 5-cup food processing attachment If you come across another variant or your blender is different, please let us know in the discussion section below, and we'll update our review. We expect our results to be valid for the other variants as well, although we haven't tested the performance of the food processing attachment or the '8-cup Tritan Jar', which is made of plastic and has a larger capacity, meaning it can handle bigger batches. Our model comes with a 48-ounce (6-cup) glass jar and a 24-ounce personal jar, and you can see our unit's label here.

There are a few variants of the Oster Pro 1200 with different accessories.

Oster glass blender