Two, rigid 8-ft lengths of clear, 1-1/4 inch dia polycarbonate tubing will not turn cloudy from sunlight or become brittle in cold weather like acrylic sludge samplers. The design offers a slip-loc quick-disconnect coupler and twin double O-Ring seals to ensure a rugged, Liquid-tight connection. Coretaker features a check Valve for sample release; soft foam, floating lanyard handle; and pre-numbered yellow 1-ft markers. Ideal for direct measurement of sludge blanket thickness by core sample Extraction lifetime, no breakage guarantee Floats for easy retrieval no threaded couplers - uses slip-loc quick-disconnect design.