Recommended to decouple the speakers from the floor. Floor standing, Bookshelves on stand, Audio and video appliances, Audio and video furniture. Models for gluing: universality (can be installed under appliance or even under audio-video furniture). height-adjustable cone 25/29mm: suits all configurations. Adjusting tool supplied: easy to fit. 35mm diameter. Finishing: C880 AG: GOLD color / C880 AN : Black Color.