These can likely be attached to trekking poles from other manufacturers, so please check the specifications (see image 2). *Please note that there may be slight variations in the specifications. Brand new, unused. There are 2 pieces per bag, for a total of 4 pieces. Please understand that these have been stored by a private individual, so there may be initial scratches or slight scuffs. Will be sent in simple packaging. Price is not negotiable. Thank you very much! ´`*