Lifegard Aquatics 1/2-Inch Slip Elbow Insert on July 19, 2026 July 19, 2026 Manufacturer: Lifegard Aquatics. Manufacturer : Lifegard Aquatics. Item model number : 1/2″ Elbow Insert. Item model number: 1/2″ Elbow Insert. Material: Acrylic. Item Weight: 1.6 ounces. #1,539 in Aquarium Filter Accessories.