Grey iron casting rainwater and churn water manhole chimney grating It is hinged can open 100�Rectangle GratingMaterial*EN GJL 250 & DIN GG 25Class*C 250Product Info Product weight is 135 kg. Manufactured in compliance with EN124 NotesWeight tolerance: plus or minus 2 kg (up to 24 kg)plus or minus 3 kg (24�125 kg)and plus or minus 4 kg (over 125 kg).