The plastic hoop is in the top

Screw Diameter(OD * L): 23 MM x 13 MM

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Features: Made of automobile grade steel

YZF600 YX600 1995-2007

Throttle Body For Chevy GMC 87-90 350 5.7L Truck Silverado Tahoe Suburban TBI Volvo Car Repair Tool The plastic hoop is inThrottle Body For Chevy GMC 87 90 350 5. 7L Truck Silverado Tahoe Suburban TBI Specifics: Material: Aluminum Condition: 100% Brand New Type: Throttle Body Fitment Type: Direct Replacement Number of Pieces: 1pcs Placement on Vehicle: Front Fuel Type: Gasoline Connector Quantity: 4 Fitment For: For 1987 1990 Chevy & GMC 5. 7L Series C1500 C2500, K1500 K2500 Suburban Tahoe Silverado ALL Transmissions Package Included: 1x Throttle Body Warranty: Returns: