iOptron Tri-Pier 360 Heavy-Duty Portable Pier - 8037AiOptron Tri Pier 360 Heavy Duty Portable Pier The iOptron Tri Pier 360 is their Heavy Duty Portable Pier for use with their CEM120 Mount and heavier than normal payloads. This adjustable height portable pier has a super payload capacity of 360 pounds, max. weight. It can be adjusted in height from 33. 9 inches up to 40. 2 inches, for lots of flexibility to suit your observing requirements. This iOptron Tri Pier 360 is the recommended Heavy Duty