The Frelan Hardware 39mm Porcelain Cupboard Knob Black is traditionally used in cottage style kitchens. This knob is made from traditional plain black porcelain.  It would be suitable for all types of fitted or free standing furniture in residential situations and is simple to fit and maintain. Cupboard Knob Dimensions The cupboard knob has a 39mm knob diameter and is supplied with appropriate fixing screws. There is also a 33mm version available as a separate product in the related products.