This T-Slot Gasket is made of flexible PVC and fits all 20 Series extrusion. It is also commonly referred to as slot insert or seal strip and has numerous uses in CNC and other extrusion applications. The strip is ideal for noise and vibration reduction between the frame and outer panels, panel sealing to prevent dust, debris, and other material from escaping or ending up in the channel, and general aesthetics if you want to have a little more “finished” look. The material is sold by the meter, and will be shipped in a single continuous piece for orders up to 25 meters in length. To use it, simply press it into the slot, the ribs and profile of the strip will hold it in place.