3 Axis Spirit Level. (except for Minolta and For SONY SLR as they use their own flash mount). Fits securely over the hot shoe. Crystal-like surface, clearly sees the level direction. Lightweight and small size, convenient to carry.
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4PCS/Set Camera Bubble Spirit Level Flash Hot Shoe Protector Cover Cap For Canon Nikon Pentax Sony A7/ RX10 Camera Accessories
Aliexpress UK
Made from rigid plastic, this level features a glossy finish and is washable for easy maintenance.
eBay
8X35mm Precision Spirit Level Bubble Mini Bubble Cylindrical Bullseye Level Balancer Spirit Level Photo Frame Measure Horizontal
Aliexpress UK
Protect your camera's hot shoe and keep it safe from dust and moisture with this universal hot shoe cover. The snap-on mount type ensures a secure fit on your camera, without the need for any extra tools or accessories. This hot shoe cover is compatible with all camera brands and comes with a bonus hot shoe spirit level cover for added convenience. Manufactured in China, this hot shoe cover is backed by a 1-month manufacturer warranty. Designed for cameras, this hot shoe cover is an essential accessory for any photographer. Keep your camera's hot shoe in top condition with this easy-to-use and reliable hot shoe cover kit.
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2pcs Mini Bubble Level Horizontal Precision Spirit Bubble Level Degree Mark Round Spirit Bubble Level Measuring Tool
Aliexpress UK
6Pcs Hot Shoe Spirit Level Hot Shoe Bubble Protect Cover Cap. Tiny and Delicate —— Small as a fingernail, less than 5g, very easy to carry and use. Close and Tight Built in a bubble spirit level, main body made of silica gel, soft and elastic, no fray to the hotshoe and covering it closely.
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RV T Level Cross Check Bubble Spirit Levels Multipurpose 2 Way Bubble Spirit Levels for Caravan Camper Van Trailers Tripods 4PCS
Aliexpress UK
1x Spirit Level Hotshoe Cover.
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HACCURY Mini Bubble Level Spirit Level Small Spirit with Mounting Holes Water Level Tool with Ears (50 Piece/Lot)
Aliexpress UK
Designed to slide into a standard hot shoe, they help ensure accurate framing for landscape, architecture, studio, and long-exposure photography. Doubles as a hot shoe cover to protect from dust and debris.
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1pc Spirit Level Bubble Mini Round Bullseye Leveller High Precision Bubble Level Horizontal Spirit Level Measuring Tool 32mmx7mm
Aliexpress UK
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1Pcs Spirit Level Ruler High Precision Strong Magnetic Spirit Level Digital Inclinometer Protractor Adjustable Angle Level Ruler
Aliexpress UK
Bubble Spirit Level. Hot Shoe Spirit Level Covers. ( Not compatible with Sony and Minolta Alpha series ). Hot Shoe Cover. You can easily see whether the bubble is centered, and this level takes up much less space than a large acrylic block.
eBay
5/10pcs Hanging Bubble Line Level Horizontal Bubble Measuring Level Gadget Spirit Level For Building Construction String Level
Aliexpress UK