Yescom 6" Air Cooled Reflector Hood with Glass Cover for HPS MH Grow Light Bulb Indoor Tent Greenhouse Hydroponics 6" Air Cooled Reflector Hood with Glass Cover; Overall Dimension (LxWxH): 24" x 16 3/4" x 8 1/4" (61 x 42.5 x 21 cm); Glass Dimension (LxW): 17 11/16" x 16 15/16" (45 x 43 cm) Aluminum with pea texture interior, high reflectivity up to 95%; Steel exterior with white painting, more durable to use With UL listed standard E39/E40 ceramic socket for compatibility with most bulbs; Fits for 250W/400W/600W/1000W HPS or MH grow light bulbs to provide superior light penetration Improved design makes the light source more centralized; Tempered glass with exhaust fan (NOT included) can deflate heat for plants not need much heat Standard 6" air vent to fit 6" exhaust fan system (NOT included); Assembly is required, easy to set up