elastic ring 1. material: rubber or silicone 2.advantages: good flexibility, oil-resistant, acid- resistant age-resistant Elastic Ring1.Discription: Elastic Ring/Loop2.Features:(1) It is made from rubber or silicone.(2) Advantages: good flexibility, oil-resistant, acid-resistant, aging-resitant, heat resistant.(3) It is widely used in voice box facilities, hardwares, air-condictioners, machine, ...