Code/Dimension/Material:
SB68-18 : 100mm x 100mm/Hardboard Base
SB68-23 : 100mm x 100mm/Cork Base
SB68-6FY: 100mm x 100mm/Felt Base
SB68-5Y : 100mm x 100mm/Rubber Base
SG-17B: 100mm x 100mm/Glass