TH Golf x100 Pcs Bamboo Red Castle Golf Tees 32mm Biodegradable Eco Friendly Sustainable. Length of the castle tee includes the 20mm Spike. This size castle tee are used for irons & small woods. Our golf tees are sourced by TH Golf and some of the most strongest bamboo castle tees you can find. Quality is always our priority for our valued customers. TH Golf is one of the largest supplier of bamboo golf tees worldwide.