Made From Durable Plastic For Long-Lasting Performance. Specifically Designed To Connect Spacer Bars At Corners, Ensuring A Secure And Airtight Seal. Suitable For Use With Aluminum Spacer Bars And Various Types Of Glass. Helps Maintain The Airtight Seal, Reducing The Risk Of Moisture Ingress And Gas Leakage.Designed For Simple And Efficient Installation, Saving Time And Labor.Resists Wear And Tear, Ensuring Long-Term Performance.