This is a A-13769-R Comp Re-mfg Sanden Style (8390) w/ Clutch (SD508, 2A - 5.25" pulley, 8/10 flare w/ access & service) PN: 13769-RMain Description As Following : A-13769-R Comp Re-mfg Sanden Style (8390) w/ Clutch (SD508, 2A - 5.25" pulley, 8/10 flare w/ access & service) P.N: 13769-R Fitting Description: Vert. Fl. #8/10Pulley Diameter: 5.250"Pulley Grooves: 2ASeries Number: SD508Volt: 12 Stocked As: A-500-244 Found in Section & Models : Air Conditioning Parts > Compressor, Steiger TRACTOR: BC SERIES I/II (w/ Early Series II), Steiger TRACTOR: CA-INDUSTRIAL SERIES (Early Style), Steiger TRACTOR: CM SERIES IV (Early Style), Steiger TRACTOR: COUGAR SERIES I/II (w/ Cougar I - Early Style), Steiger TRACTOR: CU-INDUSTRIAL SERIES (Early Style), Steiger TRACTOR: KM SERIES IV (Early Style), Steiger TRACTOR: SM SERIES IV (Early Style), Steiger TRACTOR: ST SERIES III (Early Style), Steiger TRACTOR: SWC SERIES I/II (w/ Early Series II), Steiger TRACTOR: TIGER SERIES I/II (Early Style), Steiger TRACTOR: WC SERIES I/II (Early Style) Associated Items : A-520-6900, A-520-6901, A-520-6902, A-520-6910 Also A-SI-O-CMKMSIV, A-SI-P-CMKMSM, A-SI-P-CMKMSM, A-SI-P-CMKMSM, A-SI-P-COUGARI And : Fitting Description: Vert. Fl. #8/10 Pulley Diameter: 5.250" Pulley Grooves: 2A Series Number: SD508 Volt: 12