QS-104, same as QS-4. But just the difference of the corner.
QS-104 is round corner at the bottom, which will be more easy to insert into the cuvettes holder.

Outside size: 45x12.5x12.5
Path Length 10mm
Inner width 10mm
Volume: 3.50ml

With 2 sides clear and 2 sids matt finish

Each box 2 piece matched, and transmission is over 80% at 220nm. Each face be fused together.