Suitable for 21420 or stands with tubing diameter of 25 mm. Designed to be inserted and screwed onto speaker enclosures. Plastic-coated steel flange, diameter 105 mm, depth 78 mm. Bore holes:  diameter 6.5 mm (4 x) EAN:  4016842106899 Flange:  diameter 105 mm Function:  to screw into speaker, to slip on stand Installation depth:  78 mm Material:  steel Suitable for tubing diameter of:  25 mm Type:  black Weight:  0.38 kg