This the 1/16in version. Tippmann Sports says it isn't necessary but many players want to upgrade these fittings to the 1/8in 02-103 for better air flow.
RT Flow Control Valve 1/16" on the Tippmann 98 Custom ACT RT DiagramRT Flow Control Valve 1/16" on the Tippmann 98 Custom ACT RT Pro Diagram
RT Flow Control Valve 1/16" on the Tippmann 98 Custom Pro RT Diagram
RT Flow Control Valve 1/16" on the Tippmann 98 Custom Platinum Series RT ACT Parts Diagram
RT Flow Control Valve 1/16" on the Tippmann 98 Custom RT Response Trigger Installation Manual 2006-09-17
RT Flow Control Valve 1/16" on the Tippmann A-5 RT Kit Diagram