Racks of disc golf discs from Innova

PLH and Dome Guide

We measure Parting Line Height (PLH) and Dome on every disc so you know what you are actually getting, not just what the flight numbers say.

Parting Line Height (PLH)

The parting line is the seam around the middle of the rim.

  • Higher number = higher PLH = more overstable
  • Lower number = lower PLH = more understable

This is one of the most reliable ways to compare stability between discs of the same mold.

Dome

Dome is the height of the flight plate.

  • Higher number = more dome
  • Lower number = flatter top

Flatter discs usually feel faster and handle wind better.
More dome typically adds glide and carry.

Why we show a range

You will see:

  • The measurement for the selected disc
  • The full range for that run

The range gives the number context.

Example:
PLH 6 (range 4–6)

That means you are looking at the most overstable version from that batch.

This makes it easier to:

  • Find true backups
  • Compare multiple copies
  • Dial in your stability exactly

Flight numbers describe the mold.
PLH and dome describe the individual disc.