Features: l Made of high quality material, durable and wear-resistant l Nice replacement for broken or old one, make your device work properly l Easy and convenient to install and remove l With fine workmanship and exquisite appearance l Specification: l Thickness (Optional): 0.5mm, 0.6mm, 0.7mm, 0.8mm l Size: 13-37mm(0.5mm Thickness), 13-40mm(0.6mm Thickness), 25-40mm(0.7mm Thickness), 28-38mm(0.8mm Thickness) Package Includes: l 1 Pack of 0.5mm Thickness Sealing Ring Or l 1 Pack of 0.6mm Thickness Sealing Ring Or l 1 Pack of 0.7mm Thickness Sealing Ring Or l 1 Pack of 0.8mm Thickness Sealing Ring Or l 4 Pack of Sealing Ring (include 4 different thickness of sealing ring)