Only to be used on hard floor surfaces, not on carpeted floor. 
Photos show item in use with Tannoy Definition DC8 speakers and Soundstyle Z series speaker stands.
BindingElectronics
BrandSpike Specialists
EAN8800209285749
LabelSpike Specialists
ManufacturerSpike Specialists
PackageQuantity1
ProductGroupCE
ProductTypeNameCE_ACCESSORY
PublisherSpike Specialists
StudioSpike Specialists
TitleSet of 8 Speaker Spike Floor Protectors (Silver)