40 Pcs Air Push Quick Fittings 4 Different Types of Pneumatic Fitting Push Straight Connector L Connector Y Union Connector and Tee Union for Quick Connection of Air Piping Pneumatic Tools(6MM) :
METAL PNEUMATIC PUSH IN FITTINGS HOSE TUBE WATER AIR SPEED FIT JOIN ADAPTOR TEE | eBay
8mm Bulkhead Union Push in Fitting Metric Nylon Pipe/Tube air line pushfit Joiner Connector UK
Pneumatic Push In Fittings Straight PG Connectors For Air Water Hose Many Types | eBay
Othmro PU-12 Straight Push Fit Connectors, Pneumatic Fittings, Pipe Quick Connector for 12mm Air Water Hose 10pcs : Amazon.co.uk: Business, Industry & Science