Opening in het midden: M10 (of wel 1.0 cm)
| Material: | metal |
| Colour: | silver |
| Inner Diameter (cm): | 1.0 , M10 (0.39 inch) |
| Outer Diameter (cm): | 4.0 (1.6 inch) |
Metal lamp check ring, 4.0 cm / 1.6 inch diameter.
With an m10 opening in the middle section.
Can sometimes come in handy when you are refurbishing a lamp.
