The Elite Knee Wake racks are saltwater friendly. They feature a brushed anodized tines and a backing plate with black RWA logo medallion and integrated webbed bungee strap with loop. It will hold one kneeboard up to 5 inches thick and one wakeboard up to 1.15 inches thick. EACH SOLD SEPARATELY Tine Spread 10.0 in 25.4 cmKnee Tine Gap 5 inches 12.7 cmWake Tine Gap 1.15 inches 2.92 cmMaterial 6061 aluminumMounting Hardware 316 stainless steel Salt water friendly