Black Plastic Mounting Bezel for 3mm Round LEDs This T1 snap-in mounting bezel is for 3mm (T1) LEDs and features a 0.185" mounting hole diameter for up to 0.07" panel thickness. The holder then keeps the LED securely in place. The black face improves the appearance of the LED and offers a high contrast with the LED light. Specifications For 3 mm round LEDs Panel thickness: 0.07" max. Panel hole: 0.175"