Mechanical tube length: 160mm Triple nosepiece Eyepieces: H10X,H12.5X,H16X. 185 achromatic objectives: 4X/0.1, 10X/0.25, 40X/0.65. Separate fine&pinion.The rack stop prevevts damage to slides&objectives. F50mm plano-concave mirror. Each set in a foam in an inner box,4 boxes in a master. Packing for option:Each set in a foam in box,4 boxes in a carton.