Features Material: EVA (Ethylene Vinyl Acetate) foam, Technopolymer, Steel Number of spouts: 16 Compatibility: NH-L9i, NH-L9i chromax.black, NH-L9i-17xx, NH-L9i-17xx chromax.black, NH-L9a-AM4, NH-L9a-AM4 chromax.black Number of screws: 4 Thickness of the spacers: 10 mm, 3 mm, 5 mm, 6 mm, 7 mm, 4 mm Number of washers included: 7 Ventilation duct height: 5 - 45 mm