Convex surface base 10 sets

Convex surface base 10 sets 
pack: 121pcs /set
          1 red cube, 10 blank flats, 10 rods and 100 1cm units
           red decimeter cube : Hollow (light),
           can be either one unique (closed) or box-like.
Size: 26x11x11.5 cm / 615.80g / 692.8g