Dense Silicone Bristles: Thin and dense silicone bristles effectively penetrate narrow corners and crevices of sewing machines, removing accumulated dust, , and threads with ease. Reusable and Easy to Clean: After use, simply wash the brush with soapy water and air dry to remove dust and lint, ensuring it's ready for reuse next time. Material: Made of soft silicone brush heads and plastic handles, this brush is , flexible, and . The silicone brush is resilient, bendable, and capable of fitting into various space shapes effortlessly. Optimal Size: Each cleaning tool brush measures about 4-1/8 inches (10.5 cm), including a 1-inch long brush section, allowing it to reach deep into tight and hard-to-reach crevices in sewing machines. Practical Set: Our set includes 4 silicone brush heads of different shapes, totaling 20 pieces. This provides ample quantity for long-term use and versatility in cleaning various space effectively.