Square D individual meter sockets have provisions to feed a downstream main lug load center, main breaker load center, or an individually enclosed service disconnect. Units can have a combination of releases, horn, or no bypasses to handle any meter socket situation. Units supplied with hub opening in top end wall require the use of a bolt-on hub or closing plate. This accessory is a hub which is rated for 2.00 in wire size on Series A systems. This hub is rainproof and measures at 3.31 inches tall, 3.31 inches wide and 1.03 inches deep. Prop 65: WARNING: This product can expose you to chemicals including: Nickel compounds, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov - Compatible Products: CM200S; CQRA200; EMT3225CB; QC12L200C; QC2442M200C; QC3040M200S; QC816F100CH; QC816F125C; QC816F150C; QC816F150S; QC816F200CH; QC816F200S; RC12L200C; RC1624M100S; RC200S; RC200SFMG; RC2040M150CH; RC2040M200C; RC2040M200CGP; RC2040M200CH; RC2040M200S; RC2040M200SHS; RC2M200S; RC3040M150SL; RC3042M200PS; RC816F100CH; RC816F125CH; RC816F150C; RC816F150CH; RC816F200C; RC816F200CH; RC816F200S; RCM200SL; SC1624M100F; SC1624M100S; SC1624M125F; SC1624M125S; SC816D150C; SC8L125S; SO1020M100S; SO1020VP; SO2040M200S; SO2040VP; UGHTRS213C; UHTRS101B; URS202BCR; UTRS101B; UTRS212C; UTRS213B; QC816F200C; SC2040M200C; SC2040M200PF; SC2040M200PS; SC3042M200PF; SC3042M200PS