1 inch Aluminum Hose Plug with 5/8-18 Female Port E45.13-BLUE The 95mm ID at one

The 95mm ID at one end and 83mm ID at the other end let you connect a 3 3/4" OD tube to a 3 1/4" OD tube

The 4-ply reinforcement results in a 5mm wall thickness (93mm / 3 5/8" and 67mm / 2 5/8" OD) and a working pressure rating over 20 psi (100 psi burst pressure)

Lengths can be screwed together to form a continuous length if you've got leftovers around

These 180 degree elbows have a 2 3/8" ID with a smooth

5mm wall thickness (113mm / 4 7/16" and 100mm / 3 15/16" OD) and a working pressure rating over 8 psi (42 psi burst pressure)

1 inch Aluminum Hose Plug with 5/8-18 Female Port E45.13-BLUE The 95mm ID at oneThis special plug makes it easy to add a mechanical temperature gauge to your cooling system. The 1 inch OD fits into the branch of any of our Silicone Coolant Hose Tees (sold separately). The female 5 8 18 threads accept the temperature sensing bulb from an Auto Meter or Stewart Warner mechanical gauge.* Black anodized aluminum for long life. * Some gauge brands require the use of a copper sealing washer where the bulb meets the adapter. A washer is