These are plastic connector / brackets for sofas and beds. Made from plastic.
eBay
Plaid Blankets Knitted Nordic Sofa Towel Sofa Cover Full Blanket Striped Room Bedside Blanket for Home Decoration cobertor manta
Aliexpress UK
Pull-out bed converts to130 × 268 cm. Premium U-Shaped Corner Sofa Bed with Storage. Sleeping area 130 × 268 cm. Pull-out bed. For upholstery, blot spills and avoid abrasive cleaners. Avoid prolonged direct sunlight to maintain colour.
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Dandys World Flannel Throw Blanket Fun Design for Bed Sofa Couch xcm Versatile Rug Piece
Aliexpress UK
The sofa is made out of bonell springs and foam and high quality fabric. Length of sleeping surface: 202cm. Width of sleeping surface: 135cm. Little Fields Way. Excellent product, easy assembly.
eBay
Convertible Sleeper Sofa Bed, 2-in-1 Foldable Sofa with Memory Foam, No Assembly Needed
Aliexpress UK
Bonell springs. Great quality corner sofa with two storage containers. Corner sofa Tom M. free standing sofa with upholstered back. Sleeping surface highly elastic foam. This is especially important in case of large corner beds and sofas (ie. ).
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Storage Relax Puff Sofa Sectional Simple Double Nordic Daybed Puffs Sofa Set Lazzy Cushion Salon Meuble Home Furniture
Aliexpress UK
Universal corner sofa bed VIKA GRANT. Sofa, Sofa Beds Futtons Couch. Living room, Wall units. Very easy convert into bed. Kids room, play room. Big storage box with easy access. - Sleeping area: 206 cm x 120 cm.
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Modern Modular Compression Vacuum Sofa Set Furniture, Sofa Bed
Aliexpress UK
These legs are great for any furniture including sofas, chairs, settee's, beds, footstools, cabinets, tables, bookcases, draws etc. If you do not have legs currently on your furniture then you can use a long bolt and try to screw in to the bottom of your furniture.
eBay
Convertible Compressed Sofa Living Room Lounges Modern Lazy Sofa Bed Straight Row Corduroy Bedroom Balcony House Furniture
Aliexpress UK
The sofa is made out of wave springs and foam and high quality fabric. Seat filling: foam/wave springs. Mattress filling: foam/wave springs. Movable headrests, high quality, 2 years warranty, bed function, large storage, easy to clean Maxi Clean fabric.
eBay
Silver fox velvet sofa cover solid color simple sofa bed cover no armrests recliner cover elastic full cover
Aliexpress UK
Corner sofa bed -ALTI. MAYBE BE LONGER ! It is designed for people who want to create an original and unique space around them. Depth seat: 56 cm. Seat height: 43 cm. Corner has Sleeping surface : 130 x 212 cm.
eBay
Living Room Sofa Bed Compressed Fabric Modular Convertible Sofa Mid Century Style Home Furniture Washable Foldable 2 Seater
Aliexpress UK