... Sealing adhesive: Temperature resistance nylon Ball: Stainless steel, gold-platedLead wire: brass, gold-platedGuide pin: Brass, gold-platedCopper tube: Brass, Nickel ... SWITCHESMaterialRoll Ball, Tube, Spring,Type Vibration sensor switches /Roll ball tilt switches /Optical roll ball sensor/ Mercury switchesFinish Nickel-plated, silver-plated ...