N025181  Straight, with lock, 18.5cm Straight with lock
N035181  Curved, with lock, 18.5cm elbow with lock
N025201  Straight, with lock, 20cm Straight with lock
N035201  Curved, with lock, 20cm elbow with lock
N025211  Straight, with lock, 21cm Straight with lock
N025231  Straight, with lock, 23cm Straight with lock
N035231  Curved, with lock, 23cm elbow with lock
N025251  Straight, with lock, 25cm Straight with lock
N035251  Curved, with lock, 25cm elbow with lock

1802321  Straight, without lock, 18.5cm Straight without lock
1802322  Straight, without lock, 20cm Straight without lock
1802323  Straight, without lock, 21cm straight without lock
1802324  Straight, without lock, 23cm straight without lock
1802325  Straight, without lock, 25cm straight without lock