... Prompt delivery & top quality 4) Professional service. Features of our rubber seals: · Working temperature: -100 to +300 degrees;· Hardness: 25~ ... High tensile Strength, Wear and tear resistance, Durable;· UL certification;· Rubber Material: NBR, HNBR, XNBR, EPDM, CR, NR, SBR, VMQ ... IIR, ACR.Please see the following features of all kinds rubber material, please choose the suitable one for your items, ...