Features: 1. Flat gasket made of calcium-magnesium-silicate fibres (CMS bio-fibres), heat-resistant up to approx. 1200 C. 2. Flue door seal with low thermal conductivity, prevents unwanted ingress of air. 3. Stove pipe seal can be cut to size, ideal for pipes with a diameter of approx. 120-200mm. 4. Flue gasket dimensions optional, approx. 125/155 mm. Specification: Material: Aluminum Silicate Product Color: White Product Size: Diameter: 125mm, 155mm Product Weight: 10g, 20g, 30g Package Included: 2 / 4 x Stove Pipe Seal About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 134771 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.