The lastolite dual duty blacksilverwhite umbrella is a translucent white fabric shoot through umbrella that can be backed with silver fabric for total control and a more specular light as a bounce colour temperature is 56005450degk light loss for shoot through equates to a 06f stop and for bounce 03f stop available in two sizes 80cm and 100cm please note this will not fit elinchrom or prolinca heads due to the thickness of the umbrella shaft