Splice Technologies? ""High Temperature"" series single fiber fusion splice protection sleeve is designed to work in elevated temperature environments. These fiber protection sleeves have been specifically developed for use in ""downhole"" Oil and Gas industry applications where continuous operating temperature resistance of 160°C is required. They also encompass outstanding abrasion and cut-through protection, high dielectric strength, and are highly resistant to most industrial fuels ideal for other ""harsh environment"" applications. Stock lengths are 40 and 60mm with an after shrink diameter of 2.3mm and will accommodate fiber diameters up to 1.4mm. This product is constructed with an inner meltable nylon adhesive tube, stainless steel strength member and a polyvinylidene flouride heat shrink outer tube. The tubes are clear to allow viewing of the fiber during and after splicing. We are proud to say that all of our products are made here in the USA, and most sleeves are in stock ready for immediate delivery.