English measurements are 67% incorrect. " as advertised. Blue = "1/4" or 8mm size shown in advert = 8.0mm CORRECT Yellow = "1/4" or 9mm size shown in advert = 8.7mm measured = 11/32" not 1 /4" 7mm and 8mm and 9mm NOT = 1/4" as shown USE METRIC DIMENSIONS ONLY INSTEAD OF WAITING AND WAITING FOR A BIGGER TIMER I WILL CHANGE FOR MY BUS [