EM-Tec SB3 heavy-duty large single pin stub storage tube is ideal for storing, shipping or transporting a large single pin stub. Protects the SEM specimen on the pin stub from cross contamination. Capacity is a single pin stub with 25.4 or 32mm diameter. Designed for 3.2mm pins with various lengths (6, 8, 9.5 and 14mm) The pin stub is held firmly in the blue LDPE cap (base) of the clear polystyrene tub. Maximum specimen height is approx. 18-23mm.