BlackDiamond Soft Squeegee Rubber has become a staple in the window cleaning industry. From the shorter profile to the high-quality raw materials, BlackDiamond has perfected the art of replacement rubber blades. Choosing from soft or hard rubber will depend on your climate and your style. If you work in cooler temperatures, the soft rubber gives you greater smoothness and consistency while you work, unlike a hard rubber that might chatter along the glass. Since rubber gets firmer in the colder temperatures, you don't want to make a hard rubber, even harder. The downfall to soft rubber is that it wears a little quicker and can get chewed up by frames or your bucket on a belt. This type of rubber works great for a wide range of angles so it is perfect for use on a pole. The BlackDiamond Rubber utilizes a short profile so the rubber protrudes just far enough from your channel to give you the greatest control. Longer profiles can allow the squeegee to start controlling you. The short blade helps you to find your perfect angle and keep it, unlike longer blades that have more flex making finding your angle more of a challenge. Get an efficient technique with this well thought out design. This soft rubber has a 48 shore factor. These are made in a natural mold and offer you streak-free results with their razor-sharp edge. Blades are shipped as two pieces connected so when you pull them apart you get the sharpest edge.