The hose size you're looking for is 1/4" - 3/8" Good luck finding it at a hardware store though. You can buy it on Amazon, it's food grade silicone and yes it fits over the stinger tip perfectly. This is what I use to make dab whips: https://www.amazon.com/Silicone-Tubing-Foot-Piece-D/dp/B00DYAFIR8/ref=pd_yo_rr_rp_7/134-2508112-5529227?pd_rd_w=HBTZU&pf_rd_p=f0356b1b-897f-45be-980e-e240d9efb0c4&pf_rd_r=YG87R3YXMMFPYF80J5EZ&pd_rd_r=11582532-9d0a-4a55-be2c-d8e62ae956d8&pd_rd_wg=k6g1V&pd_rd_i=B00DYAFIR8&psc=1 .