Trendium PIFLVES-2152RRRRRRL11-WS 21' Round Influence Above Ground Pool Sub-Assembly with 52' Vespa Wall. Influence's appeal lies in it's refined aesthetic feel. Every element comes together in complete harmony, combining the practical with the extraordinary for both appearance and comfort. Ultra attractive wall, smoothly curved top ledge, sturdy uprights, strong lines, solid construction, simplicity of design: it all adds up to influence beauty... and to years and years of vacationing pleasure for you to enjoy at home!