Haisstronica 520Pcs. Marine Grade Heat Shrink Wire Connectors-Electrical GOOD QUALITY MARINE GRADE WIRE TERMINATION:The Haisstronica heat shrink connectors kit includes ring,fork, spade,and heat shrink butt connectors.The right quality wire connectors,for the right job,is always worth expense. 99.9% PURE COPPER TINNED:Effectively prevent copper layer rust and then cause bad contact,anti oxidation prevent electrical sparks.Strong conductive. EXTREMELY RELIABLE CRIMPING:The 3:1 heat shrink connector with adhesive lined will exude hot melt adhesive after being evenly heate,quickly shrink and adhesion to the insulation of the wire.Create a complete environmental seal.Waterproof,Wear-resistant. SAFE WIRING PROJECTS:The Brazed-seam terminal connector, ensures strong sealing crimps.Salt-resistance,and corrosion resistance,provide reliable wiring. BUYER CONFIDENCE:We stand behind the quality of our products. If for any reason you are not satisfied with your purchase,please contact us.We offer a 30-day money-back guarantee,and a 12-month replacement warranty giving customers a 100% Satisfaction Guarantee for risk-free purchases!