Ltpgtdx100tr 100mm 4 inch extract fan operated by remote switch usually a lighting circuit timer adjustable 30 sec 30 minutesltbr gtltbr gtall dx100 extractor fans except the cp clamp packed model come complete with a universal mounting kit comprising of a wall tube gasket x2 outer grille and skirt moulding for window mounting in single glazing up to 6mm also suitable for wall or ceiling mounting dx100 models also include an air operated backdraught shutter outer grille