Abstract: A sexual sterilization device has titanium jaws connected at a pivot and internally lined with resiliently compressible silicone rubber. This lining serves to ensure that the lumen of a Fallopian tube remains occluded even after devitalization of the tube tissue. A stub formed on one jaw beyond the pivot engages the lining of the other jaw so urging the two jaws apart. This enables the device to be held easily in an applicator and permits preparatory opening and closing movements of the jaws to be made so facilitating positioning of the device.