The GTSL90 surface mount track is similar in size and shape to the GT90, but is made from a high end, super strong polymer. Designed for light to medium duty applications, the single GTSL90 kit comes ready to install and includes either a 4", 8", 12", or 16" track, drilled and with hardware. The optional FullBack backing plate provides easier installation and increased security. Want to add some style to your rigged platform? Not intended for use with the RAM Mounts Quick Release Track Base. The super high-end polymer used in this product is specifically designed to withstand the harshest marine environments. It is compatible with 1/2" wide track hardware, with a hole spacing of 1-3/4". The product measures 0.90" wide by 4" long and proudly holds U.S. Patent No. 9,671,060 B1. It is made in the USA and is covered by our Built for Life Guarantee. SKU: GTSL90-OG04