Inner plug measures 5/8" and with the flanges it measures 7/8" as shown in last two photos. Protect, seal, and finish exposed tubing ends with these heavy-duty 1" round push-in plugs. Designed to fit tubing with .844"?.944" inside diameter, each plug locks securely with ribbed sides for a snug, tool-free fit. Why you?ll want these: Prevents dirt, moisture, and insects from getting inside tubing Stops rust and corrosion at exposed ends Creates a clean, professional finish for any project Reduces noise and protects floors when used on furniture legs Quick push-in installation ? no hardware required Where they?re used: Chair, table, or furniture legs (protects floors) Fitness equipment, weight racks, and gym stands Metal tubing on trailers, shelving, display racks, or machinery Fencing, gates, and outdoor posts Temporary capping for open tubes during construction or transport Each pack includes 10 plugs ? durable, weather-resistant, and reusable.