Material: Polyamide 6.6. Please realize: A complete coupling consists of one sleeve part and two hub parts. All 3 components have to be ordered separately. So, at each outer size, various bore diameters can be chosen and combined. Sleeve part = Taschenteil. Hub part = Nabenteil. Bore tolerance + 0.05/-0.10 mm with feather keyways according to DIN 6885/1±0,08 mm. Grub Screws, Stainless steel V4A. Largest axial displacement = max. ±1 mm. Largest angular displacement = max. ±1° at each hub. Largest radial displacement at speed 1500/min: Size 14 and 19: max. 0,3mm. Size 24: max. 0,35mm. The permissible displacement values are dependent on power and speed. Temperature range: -25°C up to +100°C (up to +120°C at short time).