Practical Material: the brush is composed of a soft silicone brush and a plastic handle; The brush part is made of silicone, which is light and soft, not easy to break, can be bent and rebound at , and can be easily incorporated into space of various shape. Reusable: the brush after use can be washed with soapy water and air dried to remove dust and lint on the cleaning tool brush so that it can be applied again next time. Suitable Size: each cleaning tool brush is about 4-1/8 inches/10.5 cm, including the 1 inch long brush section; Enough to reach deep into tight, hard to reach crevices in sewing machines Dense Brush: thin and dense silicone bristles can penetrate deeply into the narrow corners and crevices of the sewing machine to clean away accumulated dust, and threads. Practical Set: we provide 4 silicone brush heads of different shapes, which can be applied inside various spaces; 5 pieces each, 20 pieces in total, a sufficient quantity to use for a long time.