cciyu 10 pcs T10 W5W Red Halogen Light Bulb 168 194 Instrument Cluster Gauge Dash Lamp 12V Base Type: T10/194 (W2.1x9.5d Wedge);Fit diameter 1/2/ Hole twist lock base socket Cross Reference:W5W (194 168) 147 152 158 159 161 168 184 192 193 194 259 280 285 447 464 501 555 558 585 655 656 657 1250 1251 1252 2450 2652 2921 2825 504 2821 12256 12961 M158 Application: Interior (Map, Dome, Trunk,License Plate Light),and also use for Dashhboard,Side,Indicator,Instrument panel,Seedometer;Shifter,AC panels and other gauges Light;Air conditioning indicating lamp;Center Console,interior light,etc. Led Buld Size:9.7mm x 24.66mm ; Base Type: T10194 (W2.1x9.5d Wedge) Please NOTE: If the LED does not light up, simply Rotating it 180 degrees (reverse the polarity)