... vlots 2.meet the RoHS standard 3.type:zip-lock, open-end, seal-top...... It has antistatic, preventing electromagnetic interference, moistureproof ... than 0.1 Ω.It has perfect sealing, has a good waterproof, resistance oxygen, avoid light, durable thorn. The product is ... and accessories, vacuum packing, telecommunication. All sizes are available in open flat, ziplock and tridimensional styles