Rectus 20 interchangeable coupling female, male thread
Rectus 20 interchangeable coupling male
Rectus 21 interchangeable coupling female
Rectus 21 interchangeable coupling female thread
Rectus 21 interchangeable coupling male
Rectus 21 interchangeable coupling male with outer thread
Rectus 21 interchangeable female inner thread
Rectus 21 interchangeable plug with inner thread
