Increases Use for Wheelchair Ramps The Top Lip Extension (TLE), for the Suitcase product line of portable ramps, increases the reach of the ramp by extending the top lip transition plate from 3″ to 9″. Attaches to Standard Lip The Top Lip Extension (TLE) attaches easily to the wheelchair ramps in the Suitcase portable ramp product line. Slip-Resistant Surface The extruded slip-resistance surface of the Top Lip Extension (TLE) allows for superior traction. Made of Aluminum The Top Lip Extension (TLE) is made of aluminum for strength. 500 pound weight capacity.