a. Standard DIN 2215 / ISO 4184

Profili: X5 (5x3), XY/X6 (6x4), X8 (8x5),  ZX/X10 (10x6), AX/X13 (13x8),  BX/X17 (17x11), X20 (20x12.5), CX/X22 (22x14