Dental Metal Contoured Matrices Matrix Combined with Clamp, 16 pcs.(1.550) shape 1 (one central ledge) - 3 pcs. shape 2 (two central ledges) - 3 pcs. shape 3 (left ledge) - 3 pcs. shape 4 (right ledge) - 3 pcs. shape 5 (without ledge) - 4 pcs.