Our VESA Adapters embody a unique solution to solve the Monitor to VESA hole pattern compatibility issue. Studied and designed to be strong, and avoid bending. We strive to create products that are long lasting and most importantly; keep your monitors safe and secure, all while giving you the luxury of extra desk space and ergonomically friendly options. MODELS SUPPORTED: HP 22ER, HP 22ES, HP 22EB, HP 22EA, HP 22F, HP 22EF, HP 22FW, HP 23ER, HP 23ES, HP 23EB, HP 23EA, HP 23F, HP 23EF, HP 23FW, HP 24ER, HP 24ES, HP 24EB, HP 24EA, HP 24F, HP 24EF, HP 24FW, HP 25ER, HP 25ES, HP 25EB, HP 25EA, HP 25F, HP 25EF, 25FW, HP 27ER, HP 27ES, HP 27EB, HP 27EA, HP 27F, HP 27EF, 27FW ***DOES NOT WORK WITH ANY OTHER HP MODELS. IF YOU DO NOT SEE YOUR MODEL NUMBER LISTED, YOU NEED A DIFFERENT ADAPTER! VESA BRACKET PATTERN: 75mmx75mm, 100mmx100mm - Gladiator Joe Inc. has not tested our VESA adapters for vertical use. Please use discretion if you decide to do so. Material: Certified Cana