Gear Shift Knob for 13/15/18 Eaton Fuller Sloped Knob Red Plastic GG#93187 you can count the number

you can count the number of tabs on the old hub cap and determine if they are even or uneven or you can look at the wheel and determine how many slots/locators you have and if they are even or uneven spacing

center opening is 2 5/8" inside diameter

} Material: Chrome plastic housing

Freightliner and various other vehicles

13/16" or 21mm inside diameter

Gear Shift Knob for 13/15/18 Eaton Fuller Sloped Knob Red Plastic GG#93187 you can count the numberThis gearshift knob coordinates with the red steering wheel spinner by Grand General part number 80106. It is a colored plastic, not painted on. Application: Peterbilt, Kenworth, Freightliner, Volvo, Mack, and Ford with an 13, 15, or 18 speed Eaton Fuller sloped gear shift knob (will not fit right hand steer vehicles) Mount: two screw mount, push in top cover, has screw driver slot to remove top cover Material: plastic Size: base: 1 7 8" diameter;