42-3250 - Audio Pinch Roller
PINCH ROLLER AUDIO 9MM OD 6MM W 1.55MM ID Audio Pinch Rollers, Dimensions: (O.D. x W x I.D.) 9 x 6 x 1.5 mm, Bushing Material: Nylon, Used for: Cassette tape mechanism
Mfr Name: Distributed By MCM
Mfr Number: AP-9
42-970 - Pinch Roller
Most often used size for cassette tape mechanism Nylon bushing 1/2" outside diameter 1/4" width, 2.3mm inner diameter
Mfr Number: 42-970
I have used MCM for many years and would give high recommendation for getting the job done right.