PECO SL-110 Streamline Rail Joiners are designed for connecting flat bottom tracks. These joiners are suitable for Code 75 & 82 Track, including OO/HO, HOm, and HOn3 scales. They meet the standards for enthusiasts who prefer to run trains on scale height rail, compatible with 00/H0 Fine Standard Track Systems (Ref nos. SL-100F, 102F, 104F, 106F) and H0m (SL-1400) and H0n3 (SL-1500) track ranges. These joiners can also be used with the Code 83 Line American range (SL-8300 and 8302) and Code 75 Bullhead track (SL-108F). Insulated rail joiners are required to provide electrical breaks where Electrofrog turnouts are used. Each pack contains 24 joiners.