Nelson Winbag Inflatable Shim (Model WB20)

The Nelson Winbag Inflatable Shim is an innovative air-cushion leveling tool that replaces traditional wood or composite shims. Constructed from premium fiber-reinforced rubber, this inflatable shim lets you achieve precise leveling and positioning—without marring surfaces—when installing or adjusting windows, doors, cabinets, furniture and household appliances. Simply slide the deflated shim into the gap, pump to the desired height, then lock in place with the integrated release valve for rock-solid support up to 220 lbs.

Designed for professionals and DIYers alike, the Winbag Inflatable Shim streamlines the shimming process, saving time and effort on every job. Its ultra-thin profile when deflated (just 2 mm) slips into the tightest spaces, while the durable construction allows repeated use without splitting or tearing.

Key Features

• Replaces multiple wedges and wooden shims for faster, damage-free leveling
• Fiber-reinforced rubber supports up to 220 lbs per shim
• Ultra-thin 2 mm profile when deflated for insertion into narrow gaps
• Built-in one-handed air pump and release valve for precise height control
• Scratch-free design protects delicate surfaces

⚠️ WARNING: This product can expose you to Lead known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.