wood stair handrail 1.Size:1100*90*90mm,1100*113*113mm,1100*70*70mm,1100*53*53mm 2.stair tread size: 900*250*30mm,800*250*30mm 3.number of step:13+1,14*1,15+1,16+1 4.number of baluster:26,28,30,32 5.the riser of step:200mm 6.Thickness:(+- ) 10% of wall thickness 7.number of supper:2,3. Below please find some of essential information for your reference 1.solid wood stair:rubber wood stair,you can choose red oak,beech wood ect 2.Applicable Scope:Construction company ,office building ,personal villa,ect. 3.Riser Adjustment: Its possible to adjust the riser of each step betwween 200-228mm without having to cut or adjust baluster 4.This stair can be made by customers drawings or ours 5.Specification:Based on customer's requirements Please dont worry about our products quality and about delivery , we always delivery in time, purchase step 1.Design:we supply CAD drawing for reference according to size you provide 2.Negotitation: the quality ,price, material,delivery time,payment,terms and so on 3.Production:according customers confirmed drawing with detail dimensions 4.Delivery time: by sea , according to customers request