... service; 2) Competitive price, 3) Prompt delivery & top quality 4) Professional service. Silicone Square Rings Features :· Working temperature: -100 to +300 degrees ... , FKM, LAS, FVMQ, FFKM, PTFE, PU, ECO, IIR, ACR.Please see the following features of all kinds rubber material, please choose ... , 6375, 7075Here are some photos for your reference: Silicone Square Rings