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General Info
Product Name: Universal String Inserts / Tire String Inserts / Tire Repair Plug Inserts
Part Number: SI-351
Size: 3.5 x 100 mm, Available in Black or Brown
Brand: HOPSON TYRE REPAIR
Packaging: 10 pieces per sheet, 12 sheets per box
Application: Designed for tubeless tire repairs
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Key Selling Points
1. Quick and temporary sealing through compression only.
2. Suitable for both radial and bias-ply tires.
3. Ideal for use in golf carts, lawn mowers, and ATVs.
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Quality Guaranteed
We ensure high-quality products that are comparable to leading brands like REMA TIP TOP AND TECH. Free samples are available upon request for testing and evaluation.
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Product Description
The HOPSON Universal String Inserts are designed for quick and efficient repair of small punctures in tubeless tires. These inserts feature a unique gray cushion gum that flows into the damaged area, sealing the inner liner as well as broken cords and cables. The insert permanently vulcanizes to the tire, making it ready for immediate use. They are suitable for both bias and steel-belted radial tires and can be used during the retreading process. For best results, they should be used with an appropriate repair unit. Note: Industry standards recommend demounting the tire and repairing it from the inside using inserts and a proper repair unit on the innerliner.
Note: When placing an inquiry, please include the following details if possible:
- Part Number
- Quantity
- Packaging Details
This will help us respond to your request more efficiently. Thank you.


Part No. | Description | Box Qty | Case Qty |
SI-351 | Dia. 3.5mm, Length 100mm; Brown/Black; 10pcs/sheet | 12 | 80 |
SI-352 | Dia. 3.5mm, Length 200mm; Brown/Black; 10pcs/sheet | 6 | 80 |
SI-451 | Dia. 4.5mm, Length 100mm; Brown/Black; 5pcs/sheet | 12 | 80 |
SI-452 | Dia. 4.5mm, Length 200mm; Brown/Black; 5pcs/sheet | 6 | 80 |
SI-601 | Dia. 6.0mm, Length 100mm; Brown/Black; 5pcs/sheet | 12 | 80 |
SI-602 | Dia. 6.0mm, Length 200mm; Brown/Black; 5pcs/sheet | 6 | 80 |
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It is composed of support rods and V-profile wire rolling welded on the special welding machine. We can adopt different material to suit your work condition. The common material are 304, 321, 316 L, 904 L, duplex steel 2205, duplex steel 2207, Monel. etc
Wedge Wire Screen,Conical Johnson Screen,Stainless Steel Conical Johnson Screen,Conical Wedge Wire Johnson Screen
Xinxiang Shengda Filtration Technique Co., Ltd. , https://www.shengdafiltration.com