Kuntorie 6-Cup Glass Blender Jar Replacement for Oster Classic Series – Complete Kit with 4-Fin Blade & Gaskets

Kuntorie’s 6-cup glass blender jar replacement is a complete aftermarket kit—glass jar, four-fin blade assembly, lid, base collar and two gaskets—designed to fit Oster Classic Series blenders (not compatible with Oster Pro, Master or Versa).

If the glass jar on your Oster Classic Series blender is cracked, clouded or the blade assembly has stopped sealing, this Kuntorie replacement kit restores function without buying a whole new appliance. The set is engineered to match the Classic Series’ base opening and includes spare gaskets to ensure a tight seal. These are non-original aftermarket parts, made to be a direct swap for many Classic models where the base opening measures 3 3/8".

Will this replacement fit my Oster blender?

Measure the opening of your blender base before ordering. This kit fits bases with an opening of 3 3/8" and is intended for Oster Classic Series jars; it will not work with Oster Pro, Master or Versa models. Fit depends on the base size and mounting style.

• Check your base opening — must be 3 3/8" exactly.
• Designed for Classic Series mounting patterns and seals.
• Not compatible with Pro, Master, or Versa model families.

How do I install the Kuntorie glass jar and blade assembly?

Installation is straightforward: remove the old jar and blade unit, fit the new blade into the jar base, place the gasket, and screw the base collar onto the jar. Make sure gaskets sit flat to prevent leaks. Always test with water first to confirm a secure seal before blending foods.

• Disassemble old jar and clean mating surfaces.
• Position gasket, secure blade assembly, tighten base collar by hand.
• Test with water to confirm no leaks before first use.

What materials and parts are included, and what can I blend safely?

The kit includes a 6-cup tempered glass jar, a four-fin stainless blade assembly, a threaded jar base/collar, two replacement seal gaskets and a lid. The glass jar resists staining and odor retention; the four-fin blade handles smoothies, sauces, dressings and ice-chopped drinks for everyday kitchen tasks. Avoid thermal shock by not placing very hot liquids into a cold jar.

• 6-cup tempered glass jar for durability and low odor absorption.
• Four-fin blade for efficient chopping and blending of soft to medium-hard ingredients.
• Two spare gaskets and a lockable base collar for leak prevention.

How do I maintain and extend the life of this replacement kit?

Regular cleaning and careful handling keep the jar and blade performing well: hand-wash or top-rack dishwasher-safe parts as appropriate, inspect gaskets for wear, and avoid grinding extremely hard items like unpitted frozen fruit or metal. Replace gaskets at the first sign of cracking or flattening to preserve a tight seal. Store the blade assembly dry and assembled to protect the threads and gasket.

• Clean parts after each use and dry gaskets thoroughly.
• Inspect and replace gaskets when they show wear.
• Avoid abrupt hot-to-cold temperature changes to prevent glass stress.

Who is this for: This Kuntorie replacement kit is aimed at home cooks and small household users who own an Oster Classic Series blender and want an affordable way to replace a damaged or worn jar and blade assembly without purchasing a full new blender. It suits anyone seeking a durable glass jar, a dependable four-fin blade for everyday blending, and extra gaskets for continued leak-free use. If your base opening matches 3 3/8" and you don’t own Pro, Master or Versa models, this kit is a practical, cost-effective repair option.