Atoplee M6 M8 M10 M12 Brass 45&deg;/45 Degree Angle Grease Nipples Fittings for Assembling/Disassembling [4 Sizes, 20pcs] Installed on hot air guns for assembling and disassembling electric elements of different sizes. Mainly suitable for hot air guns which equipped with diaphragm pump. Resistant to high temperature, no leakage, convenience to replace, versatility. Design: 45 Degree Material: brass