Heavy Duty Plastic U Shim Set For Windows And Doors, 3 By 4 Inch Size, Adjustable Thickness From One Sixteenth To One Quarter Inch, Leveling Shims For Precise Installations, Stack Shim BFSEALS 100 Pack, Made In USA, Free Fast Shipping

Premium Adjustable Plastic Shim Set for Windows and Doors
✔️ Adjustable 1/16 to 1/4 inch thickness, 3x4 inch size, USA-made

These stackable, heavy-duty plastic shims provide a dependable solution for aligning window and door frames, spacings, and mounting surfaces. Ideal for builders, installers, and remodelers seeking reusable, consistent gaps.

✅ Heat-sealed into 1-inch stacks, 16 shims per stack for easy separation
✅ Thickness adjustable from 1/16 to 1/4 inch for precise leveling
✅ 3x4 inch size with strong compressive strength for heavy-duty use
✅ Color-coded options: blue, red, black for quick identification
✅ Made in USA from durable high-quality plastic

💡 What is a stackable plastic leveling shim used for in window and door installations?

These handy shims help builders quickly level frames and maintain consistent gaps during installation.

- Improves frame alignment and levelness for precise installations

- Lightweight, resistant to warping compared to wood shims

- Stackable design speeds setup and ensures repeatable spacing