WB20 Inflatable Shim - Winbag
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Overview
The WB20 Inflatable Shim - Winbag (WB20) is designed for precision leveling and shimming during the installation of windows, doors, cabinets, and household appliances.
The Winbag WB20 is an inflatable air cushion leveling tool that fills gaps ranging from 3/32 inch to 2 inches, providing controlled, adjustable support without damaging the surfaces being shimmed. With a maximum load capacity of 300 lbs, and the ability to add multiple units in tandem for larger jobs, the WB20 scales to meet a wide range of installation demands.
| Specification | Value |
|---|---|
| MPN | WB20 |
| Brand | Nelson / Winbag |
| Weight | 6.43 lb |
| Dimensions | 6 in. W × 6 in. L |
| Material | Flexible Plastic |
| Gap Range | 3/32 in. to 2 in. |
| Maximum Load Capacity | 300 lbs |
| Package Quantity | 1 pk |
Technical Features
- Hand-operated pump inflation: Inflates the air cushion manually, allowing precise pressure control to hold heavy objects securely in position during leveling.
- Integrated release valve: Enables fine, incremental adjustments — including the smallest corrections — without removing or repositioning the tool.
- Gap range of 3/32 in. to 2 in.: Accommodates a broad range of installation clearances with a single tool, reducing the need for multiple shim sizes.
- 300 lb maximum load capacity: Supports substantial loads including doors, windows, and heavy appliances without structural compromise.
- Flexible plastic construction: Conforms to irregular surfaces without scratching, marring, or damaging finished materials.
- Scalable configuration: Additional Winbag units can be deployed simultaneously on the same job to increase total load capacity for larger installations.
- Reusable design: Built for repeated use across multiple projects, reducing material waste and cost per installation.
Applications
- Window installation and leveling
- Door frame alignment and shimming
- Cabinet installation and adjustment
- Household appliance positioning and leveling
- Any application requiring temporary, controlled support in gaps from 3/32 in. to 2 in.

















