19cm splits each shelf into approx 2 equal parts.
Add extra space for tall models or up to 4 extra shelves to your Detolf allowing 8 in total for maximum display space.
The listing is for 1 set of lifters (4 pieces) to support an extra shelf of glass or acrylic.
Bottom shelf risers have a flat foot to sit on the wooden base, upper shelf risers have a tab to mount around the edge of the shelf below. You will need 1 lower set and 3 upper to add the full 4 extra shelves to your Detolf.