JingYi Hollow Base Cleat Choose 6 Sizes From 4" to 12" Material:Marine Grade316 stainless steel Four holes for attachment 6 sizes ,4" 101.6mmx36.4mmx25.4mm ,5" 127mmx39mmx27.4mm 6"152.4mmx44mmx31mm,8" 203.2mmx53.6mmx41.3mm 10"254mmx65mmx50mm