The 215-H two star ESD safe (10 - 10 Ohmssq) double-ended applicator brush has a short flat end and an extra stiff chiseled end. The bristles are soft horse hair. The overall length is 4.5.Specs amp; FeaturesApplicator, Double End, Quality: , Surface Resistivity : 10-10 ohmssq, Shape: Straight, Material: SS Handle wHorse Hair Bristles, OAL: 4.5 (112.5mm), Body Width: 0.375 (9.38mm), Body Height: 0.375 (9.38mm), Tip Width: .375 (9.38mm)