Turbidity tube with built in Secchi Disk transparency cylinder with wood support 120cm

Turbidity tube (with built in secchi Disc) x 120cm
One meter length acrylic tube with bottom secchi disc
and all necessary clip and silicone tubing,
water outlet, secchi disc and 15cm x 15cm x 5mmt base
Size : 120cm x 45mm diameter
Printed calibration scale in transparent sticker
Size: 30mm x 1000mm H
with Wood support /stand & line handle