For Gitzo Monopod and Tripod. 3/8" Male Threaded Stainless Steel Spike Foot with Anti-skidding Rubber Sleeve. Stainless steel spike foott made of 304 stainless steel, with 3/8" male thread, the overall length is about 32mm, of which thread length is about 12mm, nail tip about 20mm, with TPU gasket in the middle;.
eBay