Our Coupling stud offers the same high quality and contains all the needed parts to fix or update the blender’s connection to the jar. Through our robust internal structural design and our commitment to achieve the perfect fit while offering durability, the end product for this Coupling stud produces a superb design and a perfect fit. The result is a coupling stud that significantly reduces the vibrations of the blender and offers a smooth blending experience. Compatible Blender Models: 6628, 6630, 6631, 6632, 6633, 6634, 6635, 6636, 6640, 6641, 6642, 6643, 6644, 6645, 6646, 6647, 6648, 6652, 6653, 6654, 6655, 6656, 6657, 6658, 6662, 6663, 6664, 6665, 6667, 6668, 6672, 6673, 6674, 6675, 6676, 6677, 6678, 6679, 6680, 6681, 6684, 6686, 6687, 6688, 6689, 6692, 6696, 4100-8, 4102, 4101-8, 4165-8, 4106-8, 4108-8, 4109, 4110, 4111, 4112-8, 4114, 4115, 4117, 4125, 4126, 4127, 4128, 4129-0, 4132, 4134 [REPLACEMENT PART] Replaces worn, stripped, or damaged blender drive couplings and helps restore blender performance and smooth motor operation. [COMPATIBILITY]: Replaces Part # BLSTAC-KIT. Suitable for most traditional glass-jar Osterizers from the 1990s–2010s. Oster Blender Models: 4000, 6000, and 6600 series blenders. Not compatible with Pro 1200 / Versa / In2uitive blenders. [QUALITY MATERIALS]: This kit is composed of a square metal drive pin, a metal cover, and a durably rubber coupling assembly. Quality built parts made for long lasting usage. [SIMPLE INSTALLATION]: This pin kit is a quick and easy to install replacement part for DIY blender repairs. Reemplaza la pieza # BLSTAC-KIT. Adecuado para la mayoría de los Osterizadores de tarro de vidrio tradicionales de los años 1990-2010 Modelos tipo Oster: Licuadoras de las series 4000, 6000 y 6600. No compatible con las licuadoras Pro 1200 / Versa / In2uitive.