Description:Environmentally friendly material, soft and elastic, effectively fits the shape of the auricle, making it comfortable to wear, firm and soft as feather crystal silica. Comfortable to wear; Small and gentle; Good elasticity close to the ear; Environmental protection material; Comfortable to wear. Crystal clear and modern design. Environmentally friendly, odorless, hypoallergenic and soft liquid silicone feels comfortable to wear. 360 degree rotating loop opening 6MM. Fits for Plantronics M70 M90 M180 M1100 M925 M975 M155 M166 M50 Blade V3200. Specification: Material: Silicone. Size Chart: Size: Approx. 52x27mm/2.0x1.1inch. Package includes: 2 pcs large ear gels, 2 pcs medium ear gels, 2 pcs small ear gels, 4 pcs 360 degree rotating ear hooks. Note: All dimensions are measured by hand, there may be small deviations. Color may vary slightly depending on the color setting of each individual monitor. Thank you for your understanding. Have a nice shopping experience.