Dear friend, 1.Pls kindly note our EPDM foaming sealing strip vucalnized by pure EPDM material,. 2.We produced the EPDM foaming sealing strip with special technology,different with others,our EPDM foaming strip have one protection layer on the surface,it's can keep water out of EPDM foaming sealing strip.It's real waterproof. 3.Our EPDM foaming sealing strip have high tensile strength and high anti age performance. Our EPDM rubber strip size as below: Φ3mm,Φ4mm,Φ5mm,Φ6mm,Φ7mm,Φ8mm,Φ10mm,Φ12mm,Φ14mm,Φ15mm,Φ16mm,Φ18mm,20mm etc. EPDM rubber strip with high chemical stability, good electrical insulating performance and aging resistance, waterproof performance.It can be widely used in all kinds of buildings with low environment requirement and refrigeration,air-conditioning or other industries. It's also can be widely used in other high fields. Its resistance to alcohol, acid, formic acid, acetic acid, alkali, oxidant, such as H202, HCLO, etc.), detergents, animal and plant oil, ketone, some of the fat, hydrazine. Dear customer, Pls kindly note: We vulcanized the rubber material by using machine,products take out from mold after heating. There will have small size error about the products. Diameter of some types rubber strip max size error is ±0.5mm Rubber strip have elasticity,we measure and cut different length rubber strip by using hand with tapeline,length of rubber strip will have max size error is ±30mm