Environmentally friendly material, soft and elastic, fits the auricle shape effectively for comfortable wear. Firm yet lightweight with a soft feather-like feel. Comfortable to wear; small and gentle; good elasticity for a secure fit close to the ear. Made from eco-friendly, odor-free, allergy-resistant liquid silicone for a comfortable experience. Features a 360-degree rotary lug with 6mm opening. Compatible with Plantronics M70, M90, M180, M1100, M925, M975, M155, M166, M50, Blade V3200. Material: Silicone Size: Approx. 52x27mm / 2.0x1.1 inch Package Includes: 2 large size ear gels 2 medium size ear gels 2 small size ear gels 4 pieces 360-degree rotating ear hooks Note: All dimensions are measured manually and may vary slightly. Color may differ slightly due to monitor settings. Thank you for your understanding. Enjoy your shopping experience.