Bastille bleu limestone pavers: Blue-grey stone pavers with an aged, rustic appearance supplied in 150 x random lengths x 20mm. These durable stones work for both classic or modern settings and can be for interior or exterior use. The tiles for inside are only 20mm thick. Pool copings and treads can be produced in the same material. These also perfectly complement our Bastille bleu limestone tiles and are suitable for use with underfloor heating.