Products › Proma Quadra Image 1 of 3 Image 2 of 3 Image 3 of 3 Proma Quadra $0.00 - The Proma Quadra slab stands out for its symmetry and oversized dimension.60mm x 812mm x 812mm2 3/8" x 32" x 32" Color: Ash Charcoal Oka Beige Sky Grey Truffle Mist - Added! The Proma Quadra slab stands out for its symmetry and oversized dimension.60mm x 812mm x 812mm2 3/8" x 32" x 32"