Cool appearance. Sometimes winning or losing a party game is not about the result, but maybe about the cool look of the weapon. jgcworker's fishing line tubes make a difference in your experience inside the game. why choose a short tube fishing line? 1. relatively small deceleration, high effective distance. 2. more even force on the contact surface of the line, less damage to the soft dart, which can extend the life of the soft dart. 3. note: if the improvement is obvious, you can upgrade to higher line, such as 70°s to 80°s. How to choose. Spring Size Recommendation 1.8 spring 310mm barrel choose 100° fishing line/350mm barrel choose 90° fishing line. 1.6 spring choose 80° fishing line, small mouth purple III short dart choose 90° fishing line. 28N spring choose 90° fishing line. 25N spring choose 80° fishing line. 20N spring choose 70° fishing line. For springs under 55FPS select 70° fishing line. For Swift Blaster 1.2 spring select 60° fishing line for 280mm tube 1.4 spring select 70° or 80° fishing line for 368mm tube / 80 or 90° fishing line for 550mm tube 1.6 spring select 90° or 100° fishing line for 550mm tube The above data is for reference only Material. PLA Process. 3d printing Packing. Product net weight (G): 12g Product gross weight (G): 15g Product size (mm): 91mm long, fishing line angle 60°, interface inner diameter 16mm, interface outer diameter 19mm. package size (mm): 155*85*15mm contains details: 12 fishing line tube 60 degrees * 1 Caution. It is strictly forbidden to put the product in a high temperature environment, such as near the heating, direct sunlight in the car, etc. To prevent the product from deformation.