This foam tray has 30 slots - each slot 32 mm x 20 mm x 25 mm deep.

Ready to use - glued 10 mm foam base.

Dimension Feldherr Half-Size (HS) Foam Trays: 275 mm x 172 mm x 35 mm.

The 35 mm depth of the foam is result from 10 mm foam base and foam tray with 25 mm effective thickness