3/8" Male Threaded Stainless Steel Spike Foot with Anti-skidding Rubber Sleeve for Gitzo Monopod and GT1531 GT2531 GT3531, GT2541 GT2542T GT3541 Series Tripod Consists of two parts, stainless steel spike foot and TPE anti-skidding rubber sleeve, weight about 30g Stainless steel spike foot made of 304 stainless steel, with 3/8" male thread,hollowed design The overall length is about 32mm, of which thread length is about 12mm, nail tip about 20mm Suitable for monopod of Gitzo 3/8" standard, can replace the original spike Suitable for Gitzo GT1531 / GT2531 / GT3531, GT2541 / GT2542T / GT3541 Series tripod