All three Solarez fly-tie UV resins. Each comes in a 5 gram tube (1/10 oz) with applicator tip - ample for many flies. Contains one tube each ofย Thin Hard Formula - Super-hard scratch resistant finish; ideal for thin coats on fishing fly heads; thin formula, easy to coat or saturate; Thick Hard Formula - Hard, very viscous for making thick coatings or spheres - bodies, heads, eyes; builds fly fishing heads and bodies; viscous formula, easier to work with; Flex Formula - Flexible finish for swimmers, flex parts - could be used as a wader repair; viscous formula, easier to work with; great for coating knots for strength.