... ,pre-school,communities,restaurant,educational organization,etc.Warranty perioda,plastic part:5yearsb,posts:5yearsc,deck and stairs:5yearsd,components ... aluminium alloy by one-time cast forming. After the slinging processing, all the corners are round and smooth. All screws, ... the requirements of GB/T1221-1992 accuracy standards).e,Plastic parts:Plastic parts are formed by rotational moulding of LLDPE, ...