Sealey platform scaffold stand system sealey sscl4 nb illustrated with model no sscl1 89 2860 amp sscl3 89 7470 extension kit to be used with sscl1 amp sscl3 further increases platform height to 515m and working height to 715m constructed from robust aluminium with anodized finish for durable corrosion resistancedue to the requirement for stability legs this extension kit must be used in conjunction with sscl3 extension pack 3 89 7470 sealey sscl4 platform scaffold