Quality Tiltable MiniSun Fire Rated Downlight In A Black Chrome Finish. 90 Minutes Protection Against the Spread of Fire Complies with BS EN60598, BS5250, BS476 Parts 20, 21 & 23 Measurements: Height: 115mm x Diameter 80mm. Cut Out Hole Size: 70mm 1 x 50w GU10 Halogen Bulb Is Required - Not Supplied Reference Number: 19156. Note: This Fire Rated Downlight is NOT Suitable For Use with I-Joists (Engineered Timber Joists), Please Check the Material of Your Joists Before Purchase