PREMIUM MATERIAL: This knitting machine tensioner is mainly made of acrylic with a smooth and textured surface.Pros: This tensioner helps replace the tension in your hands. Knitting fun at lightning speed, easy and fast.EASY TO USE - This acrylic yarn tensioner works great, requires no drilling, and can be easily installed on your knitting machine at the touch of a button.Scope of application: These knitting machine tensioners are compatible with Sentro 22, Sentro 32, Sentro 40 and Sentro 48 knitting machines for easy and quick use.Package contains: 2pcs cute pink knitting machine tensioners, this part is for your replacement needs. PREMIUM MATERIAL: This knitting machine tensioner is mainly made of acrylic with a smooth and textured surface. Scope of application: These knitting machine tensioners are compatible with Sentro 22, Sentro 32, Sentro 40 and Sentro 48 knitting machines for easy and quick use. Product contains: 2 cute pink knitting machine tensioners, this part is for your replacement needs.