The BoSS 328423 150mm (6 inch) Castor designed for both aluminium and GRP BoSS Towers, the castor fits on all BoSS related Ladderspan, Clima, 700 Series and Zone: 1 GRP Scaffolds.
 
Features
 
Encompassing a bright Yellow easily identifiable Polymer yellow castor within a Aluminium Adaptor
Safety brake including in the design to secure the tower during use and eliminate lateral drifting
Castor wheel should remain undamaged any cracks or damage to the castor the adaptor, the part should be replaced before use of the component.