Glass-reinforced plastic (GRP) with non-skid rungs. Stringers 1-1/2"W x 1-1/2"D. Rungs 12"W x 1-1/2"H x 1-1/2"D. Overall ladder width 15". Step distance 12". Maximum continuous length 20' 0". Weight test is included. Drawing 803-5184098. Please specify overall length and bottom rung position (distance from bottom of ladder to centerline of bottom rung). Ships in 10-12 weeks after receipt of order.