This adapter allows a NRS 6" wonder pump to interface with a NRS B7 Leafield Raft Valve. I replaced the not so good air hose that came with the pump with McMater-Carr part number 5233K87. This hose is longer and more flexible than the original. This adapter fits this hose on one end and the B7 valve on the other. Works like a champ! I had to print it at 103% to get a good fit on the hose. I printed it with Ninja Flex. I believe the Ninja Flex shrinks more than ABS and PLA does.
I printed it 103% in Ninja Flex on my FlexyStruder to get a good fit. YMMV...