Gamma Electronics releases RPSMA cold shrink
Designed specifically for RPSMA connectors the Gamma SDL-SMA-60 is the smallest version of silicone Cold Shrink you’ll find anywhere. Starting at just over a half-inch the SDL-SMA-60 shrinks down to 0.17 inches. https://www.gammaelectronics.net/cold-shrink-for-rpsma/