Extensions are compatible with the following handles and sample tubes:

99025-04 Backsaver Handle
99025-06 Backsaver N-3 Handle
99025-02 Backsaver N-2 Handle
99025-60 T-Handle
99025-00 Conventional Handle
12-inch Wet or Dry Sampling Tubes
15-inch Wet or Dry Sampling Tubes
18-inch Wet or Dry Sampling Tubes
12-inch and 18-inch Large Diameter Sampling Tubes
12-inch and 18-inch Ag Consultant's Sampling Tubes
12-inch and 18-inch Zero Contamination Sampling Tubes
2-inch Concentric Sampling Tube