Nitro Gear and Axle strives to provide the highest quality differential components available. We take the steps necessary to ensure our parts are dependable. Our product range is continually growing to meet the needs of consumers for new ratios and applications. At Nitro we know differentials, and know what it takes to provide you with high quality components.
Details:

GM 8.875 Inch 12-Bolt, 12P and 12T, 30 Spline, Nitro Mini Spool
Provides 100 Percent Traction At All Times
Simple Design With No Moving Parts To Wear Out Or Break
No Clutches To Wear Out And No Posi Additive Required
Easy Installation, takes the place of spider gears
Differential: GM 8.875 Inch 12-Bolt 12P|12T
Axle Splines: 30
Gear Ratio: All
Material: 8620 Steel
Manufacturer: Nitro Gear and Axle
Warranty: Lifetime
Sold As Each
Fits Vehicles:

1965-1981 Chevy C10 and K10 Pickup
1965-1981 GMC C10 and K10 Pickup
1967-1981 Chevy and GMC Suburban
1969-1981 Chevy K5 Blazer
1970-1981 GMC K5 Jimmy
1971-1981 Chevy and GMC G10 G20 Van Vandura
1964-1972 Chevy /GM Passenger car
1970-1997 Toyota Land Cruiser 9.5 Inch