Small holes quickly sealed. These 16mm vulcanizing patches are perfect for repairing small punctures. Use them in combination with Simson solution for a permanent, airtight seal. An indispensable addition to your repair kit. Additional information Contents: 8 pieces. Size: 16 mm (round). Vulcanizing 8711646205200 Simson Inner Tube Patches 16mm. With these vulcanizing patches, a punctured inner tube is quickly repaired. Suitable for almost all inner tubes. Also suitable for replenishing used patches from the Simson Repair Kit. The contents consist of 8 pieces of 16mm inner tube patches. To be used in combination with Simson Solution.