The Elite Kneeboard racks are saltwater friendly. They feature brushed anodized tines, Elite Backing Plate with black RWA logo medallion, and an integrated webbed bungee strap with loop. It will hold one kneeboard up to 5 inches thick. EACH SOLD SEPARATELY Tine Spread 10 inches, 25.4 cmTine Gap 5 inches, 12.7 cmMaterial 6061 aluminumMounting Hardware 316 stainless steel Salt water friendly