Various types,colors and materials are available; The sealing property is good; Good quality quickly supply Item namedirt-proof bootSizeCustomized/standard and nonstandardBrand Namedirt-proof bootMaterialNBR,HNBR,EPDM,SILICONE,VITON,FLS,FFPM,PTFETemperatureCommon: 20~50degree centigrade;NBR(-40~120C),ACM(-30~180C),VITON(-25~300C)CertificateCE, ROHS, PAHS, REACHColorRed, Black, White, Clear, ...