Made from durable white plastic, with alternating screen-printed black quadrants
Includes attached sinker and rot-proof polymer line on polymer foam bobbin
Good-quality and economical Secchi disk for water clarity measurements. Constructed of robust white plastic disk with alternating screen-printed black quadrants. Includes attached sinker and rot-proof polymer line on polymer foam bobbin. Line length is approximately 72 feet (22 m), and includes a marking at each foot.
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