Scanstrut - Mast Mount Adapter Kit - 50100. For masts with an integral track at the front which makes it difficult to fit a Scanstrut Mast Mount.. Features. Fits all Scanstrut Mast Mounts. Compatible with Z-Spars, Selden, Isomat, Eurospars Masts. Materials. Marine grade 6082 aluminium. Polyester powder coated for a durable, gloss white finish. Kit includes. 4 x Adapter rings. 1 x Complete fastening pack. Compatible With. Z-Spars. Selden. Isomat. Eurospars Masts