Just built a 3m x 3m chiller and have spare floor panels slight damage on 2 corners but not on the inside so not an issue when constructed.
2 panels approx. 2.9 x 1.4 x 85mm thick insulation and one panel 2.9m x 400mm, they cam lock together and make a floor 2.9x2.9.
Painted Galv metal one side White, resin coated (Grey) metal other.
40 but buyer must collect soon, or can deliver for fuel money if within 25 miles of Hexham Northumberland.