Pretty sure these are ¼ BSP. 10 male plug-in ends with male thread. 30male plug-in ends with female thread. BUY IT NOW IS FOR 40 END CONNECTORS.
eBay
Powerful Water Oral Irrigation Irrigator Jet Ultrasound Air Ipx7 Waterproof Mouthwash Machines Dental Floss Flosser Irigator
Aliexpress UK
2PCS 1/4" BSP FEMALE AIR COUPLINGS. SPRING LOADED QUICK RELEASE COUPLING. 2 x 1/4" FEMALE THREADED WITH 19MM HEX.
eBay
For APPLE Original Multi-Touch Surface Magic Mouse For Macbook Pro Air Mini Laptop Tablet PC iPad Bluetooth 5.0 Wireless Mouse
Aliexpress UK
1 X 1/4 BSP FEMALE THREAD QUICK COUPLER. 6 PCBRASS QUICK COUPLER SET. 1 X 1/4 BSP FEMALE THREAD CONNECTOR. 3 X 1/4 BSP MALE THREAD CONNECTORS.
eBay
Brightly Rainbow LED Light High Speed Dental Air Turbine Handpiece 3 Water Spray Ceramic Bearing Rotor Lighting Push Button Tool
Aliexpress UK
Total 12 pcs air line connector set. 1x FEMALE PCL TO 1/4 BSP FEMALE; 1x FEMALE PCL TO 1/4 BSP MALE. 12 pcs Air Line Connectors, 1/4" BSP Air Compressor Fittings with Male Female Thread, A. 12 Pcs FEMALE & MALE PCL TO 1/4 BSP FEMALE & MALE AND HOSE TAIL.
eBay
LED Dental High Speed Handpiece Dentist Tips Air Turbine B2 M4 Push Button Ceramic Bearing Handpiece
Aliexpress UK
1x Female Quick Release Coupler with 1/4" BSP Male Thread;. 1 x Female Quick Release Coupler with 3/8" BSP Male Thread;. 1 x Female Quick Release Coupler with 1/4" BSP Female Thread;. Size : 1/4" & 3/8" BSP.
eBay
NEW Handle for Philips Hx8140 Flosser Sonicare Air Floss HX8240/HX8340/HX8350/HX8460 Electric Toothbrush Without Charger
Aliexpress UK
1/4" BSP thread on both ends. including air, water, oil, fuel, Low Pressure hydraulic. 27mm total length.
eBay
Brush Heads For Oclean Flow/X/ X PRO/ Z1/ F1/ One/ Air 2 /SE Soft Sonic Toothbrush Vacuum DuPont Bristle 7pcs Replacement Heads
Aliexpress UK
SELF LOCKING FUNCTION: C type self locking pneumatic connector is light weight with fast connection speed, provide great convenience for your life. PLASTIC STEEL MATERIAL: Pneumatic quick connector is made of rigid material, aging resistant, corrosion resistant, and no rust.
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FX Style Dental Slow Speed Set FX Straight Handpiece And FX 1:1 Contra Angle Air Motor 2/4 Hole With Ball Bearing
Aliexpress UK
Quick Release Thread Type: 1/4" BSP. Enables tools and airlines to be quickly connected / disconnected. Reduces accidental airline disconnection. Female Fitting Has Valve Inside To Prevent Air Escaping Whilst Changing Between Tools.
eBay
Dental LED E-generator Push Button High Speed Handpiece Air Turbine Triple Water Spray Hand piece 4hole 2hole
Aliexpress UK