... :15/18mm or as required Groove and slot mdf board---Product Details-----------------1, Base board : good quality MDF2, Standard size: 1220x2440mm 1220*1220mm3 ... , Groove styles : ellipse , rectangle , trapezoid or as requested7, Insert: aluminum bar, PVC bar8,Groove between : 65mm, 90mm,140mm,190mm,280mm, or ...