Lab YTgilo 8PCS Plastic Clips Glass Conical Joint Clip Test Tube Clamp Keck Clips Made of durable plastic, this swing clamp is made of POM (polyacetal) and can withstand temperatures ranging from -40 degrees Celsius to 100 degrees Celsius. YTgilo 8PCS Plastic Clips Glass Conical Joint Clip Test Tube Clamp 0.55inch Assorted Colors Standard Mouth Clamp Grinding Mouth Clamp Hookah Fastener Accessories for Household Laboratory Use To prevent the joint from separating during reaction, use Keck Clips to hold the two sides together. Conical Joint Clips, NS 12/21 type Safety Clip, POM pack of 10... Securely connects glass at ground level OIIKI 9 PCS Plastic Joint Clips Set, Keck Clamp Lab Keck Clips, for Glass Standard Conical Ideal for any science or home lab