The Manfrotto 160SPK3 set consists of 3 rubber/metal spiked feet for tripods with a lower leg-section diameter of 16mm. The spike is made from a special hard anodised aluminium alloy extremely resistant to corrosion & the feet are supplied with a dedicated tool to make fixing & removal easier. This set will fit the Manfrotto 055CXPRO4, 190XB, 190XDB, 190XPROB, 190CX3, 190CXPRO3, 190CXV3, & 055CXPRO4 tripods.