Concert Triangles Concert triangles with delicate tone - 100 % Made in Germany. TI 5 Concert Triangle, 30 cm diam. TI 4 Concert Triangle, 25 cm diam. TI 3 Concert Triangle, 20 cm diam. TI 2 Concert Triangle, 15 cm diam. TI 1 Concert Triangle, 10 cm diam. TS 04 Striker for concert triangle, diam. 4 mm