Dual graduations in feet/tenths & centimeters

Alternating red and white

5/8" top thread 

3 kinds of adjustable sections

40-minute level vial

PSP3-A 2.6M

PSP3-B 3.6M

PSP3-C 4.6M

PSP4-D 2.6M

PSP4-E 3.6M

PSP4-F 4.6M