Pat’s Audio TP-11 Add-On Anti Skate Bias Weight for the Thorens TP-11 TP-21 tonearms on the TD-165, TD-166, TD-146 turntables.Our add-on bias weight has been expertly designed and precision machined in our shop from polished stainless steel to the same size and weight as the original. This weight fits over the smaller primary weight (sold separately) and is used to increase the anti-skate bias for those cartridges that require a higher tracking force. For your convenience we also sell the same weight as a set with the primary weight. Please go to our store for the listing.If you have any questions as to whether our TP-11 Add-On Anti Skate Bias Weight will fit your Thorens turntable please feel free to inquire. As long time trusted and respected turntable service and repair experts we’ll be happy to answer your questions regarding this product or to assist you in any way with your Thorens turntable. International Buyers Please NoteImport duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding or buying.