Plastics Encapsulation Step Iron plastic coating manhole step Standard: EN13101:2002 Features: Anti-slip tread Dimensions in mm CodeLength of treadStand-off-distenceTail LengthWidth of tread mmmmmmmm HDPE SI1601601206522 HDPE SI3503501208022 Manhole step irons Conform to: BS1247-1: 1990 Material: Cast Iron Features: Anti-slip tread Hot dip galvanized coating Dimensions in mm CodeStand-off-distanceLength of treadTail length mmmmmm 150X120120150Allow bolting into walls 150x240120150120 150x350120150230Manhole Step manufacturers website:http://www.china-arfanti.com/drainage/manhole-step/