SHIP WITHIN 24 HOURS FROM MONDAY TO SATURDAY by USPS First Class with Tracking Number! Shipping: 1. We will ship your item from California and ship out the item within 1 working day after payment received. 2. Usually, The Estimated delivery day is 2-5 business days.If you don't receive the items after 10 days, please contact me as soon as you can.I will do my best to resolve the problems. Return Policy: We offer 30 days refund or exchange policy on defective or wrong items since you receive the item. Contact Us: 1. Any queries or issues incurred, please feel free to contact us, we are always here ready for help. 2. DO NOT open return request or leave negative feedback without asking for help. Insulated and waterproof: the electrical wire terminal comes with outer polyolefin tube and inner hot-melt ring, which can effectively improve waterproof performance, so it is very popular in the automotive and marine industries Practical design: these solder seal wire connectors are different from ordinary heat-shrinkable tubes, and designed with solder ring and do not need crimping; The solder seal terminals are transparent and can be accurately inspected when the wires are stripped and inserted inside Simple operation: you can just put 2 stripped wires into the solder sleeve and heat it with a hot air gun, and the insulating tube will shrink with a shrinkage ratio of 2:1 to form a waterproof seal, so as to complete the connection Wide range of uses: the insulated butt splices are useful tools to provide good protection for wires, which are often applied in automobile, ship, marine, motorcycle and vehicles, and also applied for scientific wiring projects Package includes: you will receive 100 pieces 22-18 AWG red heat shrink butt connectors, with heat shrinkable, waterproof and conductive properties, which are enough to meet your various needs.