Product specifications: diameter: 20mm, Height: 21mm. Compatibility: Suitable for cables with a maximum cross-section of 6mm. Not suitable for system cables or nautical cords. Material: Made of plastic, strong and durable. Design: This decentraliser is the perfect accessory for drawing curves or straight, horizontal or vertical, allowing you to attach the cables of a simple or multi-coloured pendant light variably to the ceiling or wall. Safety: When installing, proceed with caution, relying on competent personnel. Package includes: There are 5pcs ceiling decentralizers, complete with 5pcs screws and 5pcs dowels. Material ‎Plastic Colour Black Shape Round Size As the picture shown Type Ceiling Decentralizers Brand Unbranded/Generic M.