"Specification : 1. Dia.250x75mm; 2. 1st layer 18PCS holes(hole size 25mm for 18650mod/rda/RBA) 2ed layer 12pcs(hole size 25mm for 18650 mod/RDA/RBA) 3rd lay 5pcs holes (hole size 32mm for 26650 Mod /RDA/RBA)"