This is an antique brass hanging oil lamp or chandelier shade ring. Nice design. It does have a little roughness but can easily be straightened. There is one small crack along the edge but not very noticeable.
eBay
10pc Brass Double Taper Ferrule 4 6 8 10mm OD Compression Sleeve seal ring fittings Tube centralized lubrication system
Aliexpress UK
This Rings size adjuster combines transparent spring material to create an invisible fit for your jewelry. Whether you need a Rings connector for wedding rings or a plastic Rings tightener for daily wear, this Rings sizer quickly adapts any loose rings to any finger width, ensuring comfort and elegance in every situation.
eBay
Thickness CS3/3.5/5mm White VMQ O-ring cross section silicon rubber sealing gasket rubber washer wholesale in specifications
Aliexpress UK
This product is a light cage guard, which is made of durable iron material, with good texture, safe and practical. Easy to install and use, it can be easily applied to your light bulb. 10 Pcs Picture Holders for Tables Small Stand Photo Stands Display Card.
eBay
DIN988 0.1mm Precision Shim Ring M1.5 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12~M30 304 Stainless Steel Adjust Gasket Thin Flat Washer
Aliexpress UK
Multifunctional Car Dashboard Rubber Mat Anti Slip Non Slip Pad Black. 2 x lamp shade rings. Lamp Harp Fitting Assembly Detachable Shade Bracket Finials 8 Light. Oil Lamp Chimney Gas Lamp Glass Cover Clear Oil Lamp Shade Kerosene Lamp Part UK.
eBay
Automatic Electric Bell 220v School or Factory Bell Controller Ring Timer 2/3/4/6 inch Alarm Bell Apartment Call Doorbell
Aliexpress UK
Assorted Size: The ring size adjuster tightener fitter is suitable for most ring sizes, convenient to use that fits your needs for all different ring types. Easy To Use: ring adjuster makes it convenient to solve many ring problems, can firmly fix the ring on finger without worrying about losing your precious ring caused by other reasons, and the ring sizer can be easily wiped off to remove dirt, oil, and dust for daily maintenance and care;.
eBay
LED Lens Reflector For LED COB Lamps PC lens+Reflector+Silicone Ring Cover shade Does not include LED lights
Aliexpress UK
10Pcs DIY Jewelry Clasp Buckles S Shape for Necklace Bracelet Craft Projects. Security Reminder Rope Lock Luggage Wire Retractable Cable Holder. - Can be used to make a versatile modern drum shape lamp cover.
eBay
T4 Annular Tubes Anti-four-pin 11W 110V & 220V Magnifying Glass Light G10q Small Desk Lamps Bulb Fluorescent Ring Lamp White
Aliexpress UK
This is a very practical creative lamp shade ring. - Made with premium iron material, solid and sturdy, not easy to crack or break. - Simple appearance and easy to match with your different decoration style, suitable for ceiling light.
eBay
Universal Sphygmomanometer Cuff Double Tube Armband Medical Household Strap Accessories Cotton Cuff With D-ring Sphygmomanometer
Aliexpress UK
Antique Fitter Shade Holder Gallery Ring Light Lamp Pat 1908 Matching Set 2 This listing is for a set of two antique shade holders, with a patent date of Nov 10 1908. No other branding is visible. The finish is gold in color. Approx 2 1/4". One is missing a screw. Please review pictures and ask questions prior to purchase. Thanks for looking!
eBay
EYSDON SCT Male to Mak Female Threads T-Ring Adapter 2"-24TPI Transform to M45.4*1mm Telescope Threads Converter Conversion
Aliexpress UK