Description This solid plastic construction shims are specially engineered for precise door window frame spacer installation, delivering unwavering support and leveling for heavy-duty windows and doors. Its robust design strengthens glazing frame support spacers, improving insulation, protecting against deformation, and fitting seamlessly into both home DIY projects and professional settings. Features -Color:Multi -Material:Plastic -Size:10.00X5.00X1.00cm/3.93X1.97X0.39in -Size:10.00X5.00X0.50cm/3.93X1.97X0.20in -Size:10.00X5.00X0.30cm/3.93X1.97X0.12in -Size:10.00X5.00X0.15cm/3.93X1.97X0.06in -Enhanced structural stability: the solid design of our glazing frame installation spacer provides support, preventing door and window frame deformation and ensuring long term durability in various installations -Heavy duty support: engineered as door window frame spacer window shims blocks, these plastic structural shims deliver outstanding loadbearing capacity, making them ideal for heavy doors and windows -Quick and easy installation: with these plastic shims for leveling, you can effortlessly boost your installation efficiencyno extra tools required, suitable for diy homeowners or professional installers alike -Weather resistant performance: our window frame glazing spacers maintain their function in harsh climates; whether facing heat or cold, their resilient structure ensures sustained performance yearround -Optimal thermal insulation: the solid construction of these plastic frame shims not only improves stability but also enhances insulation, safeguarding your home environment from drafts and energy lossPackage list: 40 x shims