ALUMINIUM STOOL TYPE LADDER Aluminum ladder Supply of Aluminum Self Supporting stool Type Folding Ladder Step Size 2.5” & 1” Dia. C- Section 66 x 31 x 3 mm thickness (+ .2mm) IS- 733-1983, 1285-1975 Alloy used 6351 T-6 Hindalco Size: 4′ to 24′