4 prong spider swivels 360 and locks positively
Fits all Garelick 2-7/8" diameter smooth or fluted series stanchion tube
Anodized aluminum swivel spider mount
Compatible with the following seat bases: 75430, 75431, 75432, 75433, 75434, 75436, 75437, 75438, 75530, 75531, 75532, 75533, 75534, 75535, 75528, 75635, 75628