Zeluga 1/4in. ID x 1/4in. MPT Reusable Strain Relief Replacement Fitting Rigid. Strain relief for air hose with fitting body and nut. 1/4in. ID and 1/4in. hose connection on one end. 1/4in. MPT male rigid connection on the other end. Temperature range of -40 to +250 degrees F. Maximum pressure rating of 300 psi. Reusable fitting for 1/4in. Flexeel and flexcoil hose.