The J-RING apparatus consists of a galvanized steel crown with 16 cylindrical bars of Ø18 mm x 140 mm, fixed into the holes of the drilled circumference.
The bars have distance of 41 mm between them. The j-ring apparatus has a rectangular section of 30x15 mm and a median diameter of 300 mm.
It is usually combined with the slump cone C170 and the galvanized steel made plate C170-01, to be ordered separately.
