This looks remarkably like a bed I bought around May time which proved to be a huge PITA to build and ended up having several part duplicated and several parts missing. The corners of the metal/plastic mattress support also kept popping out so I've had to bodge add in a large commercial kitchen roll under the frame to support it from collapsing. Now maybe this is an entirely brilliant bargain bed frame, but be warned. My advice is buy something ready built and not 'faux leather' cheapo ...
Got the double size of this and sick to death of tightening the nut for the hydraulic bit what lifts the mattress
£136 Amazon https://www.amazon.co.uk/dp/B07KQT6WK6/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B07KQT6WK6&pd_rd_w=Tdn7F&pf_rd_p=8e5be0e3-b258-4b06-8b6e-695b24f935a4&pd_rd_wg=EyOFP&pf_rd_r=P05E4BHRRJ6Z2MG75FDY&pd_rd_r=3b2bb6d6-fc6f-11e8-a38c-b7c1255e229d