1,Speargun rubber 2, passed SGS and ISO 3,the elasticoty is 700% 4,be fit for speargun 1,Speargun rubber 2, passed SGS and ISO 3,the elasticoty is 700%4,be fit for speargun 5,Can be dipped or extruded6,Can be every color and every resistanceswith different diameters7,usually we produce 13mm,14mm,15mm,16mm,17mm,18mm,20mm