Spare parts and accessories for sight glasses are essential components used in industrial equipment to monitor fluid levels, flow, or process conditions. These include replacement gaskets, seals, lenses, protective covers, and mounting hardware designed for durability and clarity under high-pressure or corrosive environments. Common materials like borosilicate glass, stainless steel, or polycarbonate ensure compatibility with various industrial applications, from chemical processing to food and beverage systems. They enhance safety, extend equipment lifespan, and maintain operational visibility in tanks, pipelines, and reactors.