19 mm Square Upright Post – 12″ (≈300 mm), 54 mm Internal Bracket Fit (P/N 91803)

Overview
This 19 mm square upright post – 12″ (≈300 mm) (Part Number 91803) is designed for use with brackets featuring 54 mm internal width. Ideal for trailer-mounted rollers, guide arms, and skids, it includes one bolt and nut for secure attachment. Crafted from hot-dip galvanised steel to resist corrosion in marine environments. 

Key Features

• 300 mm (12″) length 19 mm square tubing

• Designed for 54 mm internal bracket fit commonly found in roller post kits 

• Includes one bolt & nut for hassle-free installation

• Hot-dip galvanised steel finish offers excellent rust resistance

• Bolt-on fitment—no welding required

Applications

• Trailer bow roller mounts, guide post assemblies, skid guide systems

• Suited for compact trailers and PWC trailer frames

• Compatible with matching bracket fittings using 54 mm width

What’s Included

• 1 × Upright Post (12″ length, 19 mm square)

• 1 × Mounting bolt & nut set for attachment

Shipping & Warranty
In stock and dispatched within 1 business day from Queensland. Includes a 12‑month manufacturer warranty for peace of mind.