Internal check valve isolates pump from shock ensuring accurate pressure during removal. Compact design is ideal for rear shock or small wheels with hard to reach valves.BodyBrassCheck ValveYesSize (L x W x H)2.5 x 1 x 3.8 cm1.0" x 0.4" x 1.5"Weight15 g / 0.52 ozArt.no.TSV-01