Product Features/Basic Specifications Features: Excellent waterproof, water-resistant, airtight, watertight, and durable properties. Conforms to steps and adheres firmly. Less contamination from thermal softening, and easy to apply. Superior adhesion in low-temperature environments compared to conventional products. Tape Width (mm): 50 Tape Length (m): 20 Tape Thickness (mm): 0.4 Base Material: Non-woven fabric Adhesive Strength (Aluminum plate) 24 (Needle-leaf plywood) 18 (Non-woven breathable waterproof sheet) 8N/25mm, 9.6N/10mm Properties: Waterproof, water-resistant, airtight, watertight, durable Elongation (%): 18 Tensile Strength (N/10mm): 18 Release Paper: Yes Suitable Applications: Waterproofing, water resistance, outdoor use Main Applications: Large surface materials, parts The outer box may have some stains, but there are no problems with the product. Please refrain from purchasing if you are concerned about this.