Ships in black. Other colors can be changed if you leave a comment. Increases grip, allowing you to use the power of the rubber and shaft without waste. #Spear Anti-Slip Grip List ＜Thread Wrap Grip＞ Wrap a rope or similar material around the spear, then attach the tube over it for a strong grip. Multiple purchases are also available if you leave a comment. ＜Size＞ It will definitely fit the size of our spears. It can also be used with other companies' spears with an outer diameter of 18mm to 11mm. ＜How to Use＞ Search for "heat shrink tube" on YouTube, and you'll find many videos. Basically, you shrink it with a heat gun, but our recommendation is a gas burner for barbecues or outdoor use. The trick is to keep the flame about 10cm away from the red part of the flame to avoid burning it, and shrink it with the heat. It will finish beautifully. Imagine grilling eel and slowly rotate it while shrinking it slowly. ＜Specs＞ Inner diameter before shrinkage: 20mm Inner diameter after shrinkage: 10mm Thickness after shrinkage: 1cm～ Shrinkage ratio: 2:1