Terracotta Post Topper: a clay-style planter that sits on a hollow railing post

Turn a plain hollow railing post into a flower pot. This classic terracotta-style planter wraps around the top of a rectangular hollow post, and a liner drops into the post itself. The plant gets one big root space that goes from the pot right down into the post. How it works - Insert: slides into the hollow post, and its 45° funnel rests on the post's top edge so it centres itself. - Pot: slides on from the front around the post and hangs on two V-rails on the insert. No screws or tabs. - Seam covers: two small caps clip over the rim joints, which keeps it all tidy and stops the parts sliding apart. Glue them if you want it permanent. Printing - Every part prints without supports. The pot and insert print upright; the seam covers print lid-down. - 0.2 mm clearance on every fit. - 3 mm walls, so use 3–4 perimeters. PETG is recommended outdoors. - Drain holes in the pot floor and at the bottom of the insert. Fits: hollow posts with an inner opening of at least 35.5 × 67.5 mm and an outer size up to 47.5 mm wide. Measure your post first. Size: Ø160 × 170 mm, about 2.3 L of soil.