AUTO METER 3224 Copper Tubing

can this be used on -other- brands of mechanical oil pressure gages?

How much pressure should I be able to expect this kit to handle? My Bosch copper tubing kit keeps popping off the exhaust manifold around 45-50psi

Stewart warner oil gauge. which copper tube will fit? need at least 5'. nylon supplied is mickey mouse!

Why is there only (1) compression sleeve? Two are needed, one at both ends.