【Product Dimensions】Kerf bulb weather stripping is standard 3/16” kerf depth and 1/8” kerf width，most common 1/4" bulb diameter with 1/32" material thickness. There are five different lengths to choose from here, so you can flexibly choose bubble gasket size or use a hobby knife to cut it to your desired size. 【Premium Quality】Window seals weather stripping are made of high-grade TPE (thermoplastic elastomer) materials that offer the flexibility of thermoplastics and the functional properties of traditional thermoset rubber. Window seals are extremely durable, long-lasting, heat resistant, low air infiltration, low friction and tear resistant. 【Design Concept】Used to replace worn cut weather stripping window seals and seal gaps around windows and doors. Absorbs heat and sound, greatly reducing the spread of heat and sound and effectively maintaining a balanced interior temperature. Helps prevent water damage. Weather-resistant, dustproof, shock-absorbing, sound and heat-insulating, non-slip heat-insulating. Also acts as a cushion. 【Wide Application】Kerf weather stripping are fit replace older windows&doors kerf mount gasket that are warped or no longer seated properly especially for wood frame windows,casement windows,door weatherstripping. Water seal, decorative strip, acoustic seal, fire and smoke exhaust seal, collision strip, oil seal, fixed seal, weather resistant seal, dust seal, rotary seal.al, fixed seal, weather resistant seal, dust seal, rotary seal. 【Easy to Install】 First clear the windows, measure the construction size, prepare tape measure, utility knife and other tools.Simply insert the flange into the groove to refresh the old window.The sliding coating on the top of the bulb can reduce the operating force in sliding and cleaning applications. Window Weatherstrip Seal Kerf Mount Slot 1/4" Bulb 5 Length Options