V-belt Pulleys Unbored Aluminium aluminium Unbored V-belt pulleys suitable for the profiles SPZ/Z–SPA/A–SPB/B, max. number of grooves = 2 and max. diameter = 400 mm.ExecutionProfileDiameterNumber of GroovesMaterialUnboredSPZ/Z–SPA/A–SPB/B40 .. 400 mm1 .. 2Aluminium VBP-AL-470-D-NDE-0316Documentation