Align T-Rex 250 Metal Main Shaft Bearing Block AGNH25077 by ALIGN Features: Metal bearing holder x 2Bearing MR74ZZ-d3.5 x 2 (F3.7xF7x2.5mm)M1.5 special washer x 8 (F1.5xF2.7xF3.6x1.2mm)Socket button head screw x 8 (0#x4mm)