SMC 8.5X5.5X1.5 Booster Regulator MSRP: Now: $1.15 Was: Vba Booster Regulator 21 Vba No Size Rating Parts O-Ring, 8.5X5.5X1.5 Nbr *Image Representative Of Product Category Only. Actual Product May Vary In Style. 8.5X5.5X1.5