... variety of respiratory hazards. 2>Special design for facepiece and soft durable pliable rubber material ... and light,it's very suitable for wearing 3>PP headband,very easy to wear and ... gas,acetone,carbon disulfide RC101 DUST FILTER Use with NP303, NP304 respirators ONLY ROYALROAD respirator TEC ... resistance rise(pa)≤117.6Weight (g)≤100Dead space (m2)≤160 ROYALROAD, with more than ten years’ experience, ...