1.Four digits size : 0.25inch to 1.2inch 2. Series of color can be selected 3. OEM of LITEON ... -610nmYellow 580nm-585nmKelly560nm-580nmGreen501nm-540nmCyan490nm-515nmBule 455nm-490nmPurple 380nm-410nm Four digits size : 0.25inch ,0.28inch ,0.30inch ,0.33inch ... .2x11x7.5 , 30.4x13.2x7 , 30.5x13x7 , 30x14x7 , 30x14x7.2 , 37x13x7 , 29.6x14x7.2 , 39.9x14x7 , 40.18x12.8x7 , 39x14x7 , 40x12.6x7 ...