New Arrival 60mm to 51mm Motorcycle Exhaust Adapter Reducer Connector Pipe for 60mm Exhaust 51-38mm - buy at the price of $2.42 in aliexpress.com | imall.com
Intex Adapter for Intex pools Ø 32/38mm x 2" IG - Pools.shop
Amazon.com: OMAX 38mm Thread Ring Light Adapter for Bausch & Lomb Microscopes No Glass : Electronics
Intex/Bestway Hose Adaptor A Assembly for 38mm (1.5") pool hose - HeatPumps4Pools