Greenhouse Wiggle Wire and Lock Channel. Strong and Secure Plastic Attachment Solution. This premium bundle includes a 6.56 ft. aluminum alloy lock channel and 40 pieces of PE-coated spring wire. Designed for durability, the spring wire features a tough iron core and a protective PE cover, while the lock channel is made of corrosion-resistant aluminum alloy. Together, they provide a secure, weather-resistant solution for attaching plastic or shade cloths to your greenhouse. This reliable system ensures tight fixation, even in stormy conditions, and helps maintain optimal warmth within the greenhouse. Aluminum Alloy Lock Channel, PE-Coated Spring Wire, Easy to Install, Secure and Tight Fixation, Versatile Use. Color: Silver.