John Deere Original Equipment Knob -R41387. Diameter: 31.750 mm, Length: 29.845 mm. Height: 10.160 mm. Width: 5.588 mm. Depth: 22.352 mm. Material: Rubber. Fits the following John Deere models: 2140( s.n. 430000-), 2350, 2550, 2355, 2555, 2520, 2750, 2755, 2940, 2950, 2955(s.n. -767516), 3020(s.n 123,000-), 3040(s.n. 430,000-), 3140(s.n. 430,000-), 3055, 3255, 3150m 3155, 4000(s.n. 201,000-), 4020(s.n. 201,000-), 4030, 4040, 4240, 4440, 4040S, 4240s, 4050, 4250, 4450, 4055, 4255, 4455, 4230, 4320, 4350, 4430, 4520, 4955, 4755, 4955, 4620, 4640, 4840, 4650, 4850, 4700, 4710, 5720, 5820, 5730, 5830, 6000, 7020, 7200, 7400, 7210, 7410, 7510, 7440, 7445, 7600, 7700, 7800, 8430, 8640, 8440, 8450, 8650, 8560, 8760, 8960, 8630, 8850, 9920, 9930, 9940, 9950, 600. This is an OEM John Deere Part. Thanks for looking!