Gitzo Tripod Spikes Set of 3. Includes press-on rubber feet to cover spikes. The Gitzo GSF38S Short Spike + Rubber Foot 38mm (set of 3) is a tripod accessory designed to reliably support gear on softer terrain, like grass or mud. The rubber foot is attached to the short spike like a cap, and can be pulled off when it̢???_?ĉ?_????s time to use the spike. The resistant rubber material is highly stable, even on slippery floors. The diameter of the widest part of the rubber foot is 38mm. The spike is made of high-quality machined steel. The GSF38S Spike + Rubber Foot is compatible with all Gitzo tripods with 3/8̢???_?ĉ?_??_ threaded legs. The GSF38S (along with the 30mm version GSF30S) replaces the G1220.129B3.