JLG Parts Platform Support Weld. This platform support is used to support the basket and attaches directly to the basket. This platform support is used on our smaller fleet of MEWP (Mobile Elevated Work Platforms) Model usage includes; 340AJ, E300A, E300AJ, E300AJP, E400A, E400AJP, E400 AJPN, E450A, E450AJ, M400A, M400AJP, M450A, M450AJ. Please ensure proper model and serial number range before purchasing.