The package includes 4 press wheels with frames, each measuring 2.00X1.20X1.20cm. They are black in color and made of rubber and plastic material. These pinch rollers are suitable for cassette recorders, portable music players, video tape recorders, CD players, and more. They are durable and convenient to store and carry. The pinch rollers provide resistance to give the tape a certain resistance, ensuring the magnetic head and tape make close contact to prevent signal loss. These pinch rollers are a practical and long-lasting replacement for old or broken ones. They are made by CATIEBYE and are a great addition to any recording device.