SM2L20
ThorLabs SM2L20 SM2 Lens Tube, 2" Thread Depth
A nice touch is the dust cover that protects the thermostat assembly during construction work.
ThorLabs SM2L20 SM2 Lens Tube, 2" Thread Depth, One Retaining Ring Included
Using PRI Fuel Stabilizer- For Gasoline 32oz gave my old lawnmower a new lease on life.