18*42 rubber tubing Specification: The rubber tubing is made from the top quality latex imported from Malaysia. It's specially made for slingshot with the new formula. The 18 means the inside diameter is 1.8mm, the 42 means the overall diameter of the tube is 4.2mm. Much long service life. With 10 meters this tubing, 18 pieces of 4-strand tubing sets can be made. Generally, 18 pieces of tubing set can serve a shooter for 8-10 months' small game huntings and target practice. Why use the small rubber tubing to make a slingshot? Because we have tested and found that the small rubber tubing can be stretched longer and creates greater initial velocity than the rough rubber tubing, so the multiple-strand small rubber tubings as showed below can be stretched to about 6.2 times of its original length and has much better performance than a single big tubing. What difference between 17*45 and 18*42 rubber tubing?
To put it simple, 8-strand 18*42 is slighter than 8-strand 17*45. It's easy to pull to its most. So 18*42 is for the people with average arm strength to make the 8-strand heavy slingshot,while 17*45 is for those who have very strong arm muscle to make the powerful slingshot. Both 17*45 and 18*42 are very good to make the 4-strand rubber set. We are an authorized importer of Dankung slingshots. Dankung is one of the worlds premier slingshot manufacturers in China. We pay for the freight from China and Ship to you FREE via USPS First Class Mail with Delivery Confirmation. Delivery is 2-3 business days in USA from order date.