Features The insulation material is PE which has good chemical stability and resistance to most acid and alkali attack. The contact material is tin plated brass for better electric conductivity performance. Used widely in the machinery, electric power, railway, shipbuilding, aviation, home appliance, computer or other automatic equipments. Equipped with insulated and flame‑retardant transparent insulating sleeve of the same size. Suitable for electric instruments for quick connecting, wonderful accessory. Specification: Condition: 100% Brand New Item Type: Spade Wire Terminals Material: Tin Plated Brass Insulator Material: PE Properties: Fire/flame retardant Package List:50 x Spring Self-Locking 6.3mm 1.5-2.5mm²50 x Insert 6.3mm 1.5-2.5mm² 100 x Insulating Sleeve  Package List 50 x Spring Self-Locking 6.3mm 1.5-2.5mm² 50 x Insert 6.3mm 1.5-2.5mm² 100 x Insulating Sleeve