BEKANT corner desk left sit/stand, white, 63x431/4" - IKEA
KRILLE leg with caster, black, 271/2" - IKEA
BEKANT desk sit/stand, white, 63x311/2" - IKEA
OLOV Leg, adjustable, black - IKEA
OLOV Leg, adjustable, black - IKEA
Amazon.com: VIVO Electric Motor Sit Standing Height Adjustable Corner 3 Leg Desk Frame, Frame Only, Sit Stand Ergonomic L Frame, DESK-V133E : Office Products
How to Make an IKEA Hack Standing Desk | Josh Medeski