BEK Variable Rheostat mounted on a yellow baseplate with sockets to accommodate the connection of 4mm plug leads.Excellent for general circuit work.Vary the current in a circuit using this rheostat. Supplied with 11Ω coil (spare available, see: B8H30622).Recommended Voltage: 6V max.Additional 15Ω coil is also available separately (see B8L01053)