1.material: rubber or silicone 2.good flexibility 3.oil resistant 4.acidresistant 5.age resistan Elastic Loop1.Discription: Elastic Loop2. ... rubber or silicone.(2) Advantages: good flexibility, oil-resistant, acid-resistant, aging-resitant, heat resistant.(3) It is widely used in voice box ... , hardwares, air-condictioners, machine, watch etc.3.Other photos: oil resistant and flexibleElastic Loop