Manfrotto 160SPK3 is a set of three reversible rubber/metal spiked feet (16mm attachment) designed for 190X series (190XB, 190XDB, 190XPROB, 190CX3, 190CXPRO3) and 055CXPRO4 tripods, featuring hard anodized aluminum alloy spikes encased in retractable technopolymer rubber feet with tapered concentric ridges.